Grandfather’s Ax: The Many Evolutions of the Triumph TR4, Part 1: TR4 and TR4A

RESCUED BY LEYLAND

The fly in the ointment, as you might expect, was money. Standard-Triumph had been profitable for some time, but a great deal of the company’s available capital had gone into a far-reaching expansion/consolidation program, sparked by rival BMC’s acquisition of Fisher & Ludlow, which made the body stampings for some Standard and Triumph cars. Deciding that the only way to ensure Standard-Triumph’s security was to bring the supply chain in-house, Alick Dick had begun buying up suppliers like the Birmingham-based coachbuilder Mulliners Ltd. and suspension manufacturer Alford and Adler before they could be absorbed by similarly minded rivals.

Around the same time, Standard decided to get out of the tractor business. Back in 1953, Ferguson had been acquired by the Canadian tractor company Massey-Harris. While Standard-Triumph had renewed their manufacturing contract with the new Massey-Harris-Ferguson conglomerate, the relationship had become increasingly uneasy, culminating in M-H-F’s unsuccessful attempt to snatch Mulliners out from under Standard’s nose in the summer of 1958. By mid-1959, Standard-Triumph had divorced itself from the Canadian firm, a move that brought a short-term infusion of cash, but deprived Standard of a major revenue stream. Most of the proceeds from the divorce went into the purchase of a body-stamping plant in the Liverpool area (later known as Speke No. 1) and land for a second, adjacent plant that would be able to assemble, paint, and trim complete cars; the latter was completed in 1969 as Speke No. 2.

Triumph TR3A engine
While Standard-Triumph had hoped to offer the DOHC 20X engine as an option in the Triumph TR4, standard power was to be the TR3’s familiar OHV four, commonly known as the “wet-sleeve” engine for its detachable cylinder liners. Designed in 1945, this engine also saw duty in a variety of Ferguson tractors and the Morgan Plus 4, while a 2,088 cc (127 cu. in.) version was used in the Standard Vanguard. The TR2, TR3, and TR3A retained the 92mm (3.62-inch) stroke of the Vanguard engine, but substituted cylinder liners with a narrower 83mm (3.27-inch) bore. The 2,138 cc (130 cu. in.) version, originally developed for the works rally cars and standardized on the TR4, had a bore of 86 mm (3.39 in.). There is no external difference between the 1,991 cc and 2,138 cc (122 and 130 cu. in.) versions; since the cylinder liners are removable, interchanging them is straightforward and quite a few owners have done so. (author photo)

None of these was a bad business decision, but together these purchases left Standard-Triumph’s pockets rather light at what proved to be a very inopportune moment. Export sales, previously strong, suddenly began to slip badly just as the British government, nervous about rising inflation, put the brakes on credit and consumer spending. Standard-Triumph’s total volume plunged by more than 40% from the previous year’s record and by summer the company’s monthly losses had reached £600,000 (equivalent to $1.7 million at the contemporary exchange rate).

Since becoming managing director in early 1954, Alick Dick had devoted considerable energy to finding an outside partner for Standard-Triumph, resulting in ultimately fruitless discussions with the likes of the Rootes Group, Rover (on two separate occasions), and even American Motors. With the situation growing increasingly desperate, Dick approached Sir Henry Spurrier of Leyland Motors, a major British truck and bus manufacturer. Despite the increasingly bloody state of Standard’s balance sheet, Leyland officials were receptive; Sir Henry had been considering a return to the automobile market and acquiring Standard-Triumph was a straightforward way to do so. A deal was announced in December.

Remarkably, Standard-Triumph’s mounting financial crisis did not prevent the company from returning to Le Mans in June 1960. The DOHC-engined TRS prototypes had not finished the race in 1959, but Dick and Harry Webster opted to try again with three new cars, all sporting fiberglass bodies molded in the shape of Michelotti’s Zoom prototypes. Unfortunately, while all three cars made it to the finish line, they were not counted among the finishers because their average speed was deemed insufficient.

1961 Triumph TRS 929HP front3q © 2002 James Tworow per
One of the three TRS cars built for Le Mans; this one ran in both 1959 and 1961, but not 1960. The TRS cars were bodied in fiberglass, but their shape was that of Michelotti’s Zoom prototype and therefore they look much like the TR4 might have (less bumpers and other accoutrements) had financial problems not interfered. The TRS cars were powered by the 1,985 cc (121 cu. in.) DOHC engine — officially codenamed 20X, but often called “Sabrina” because the bulbous timing gear covers at the end of each camshaft reminded some observers of busty British actress Norma Ann Sykes, whose screen name was Sabrina. (Photo: “Triumph TRS” © 2003 James Tworow; used with permission)

The 20X-powered cars would run again in 1961 with better results, but by the late summer of 1960, the Zoom project was losing momentum. While Standard-Triumph was still committed to a new body — unsold TR3s were fast accumulating at Triumph distributors and dealerships — there was now little money to spare for a new chassis. The plans for a longer wheelbase were dropped; it ultimately proved unnecessary in any case, as engineers belatedly discovered that the 20X engine could indeed be shoehorned into the existing TR3A chassis. However, Standard decided that the wider track was worth preserving, particularly since that change required only minor alterations to the existing frame and axle tubes.

This new brief — wider tracks, same wheelbase — meant that the existing Zest prototype was too small and the Zoom too big, so Standard-Triumph went back to Michelotti and asked him to create a Goldilocks version. With customary alacrity, Michelotti returned with a tidy amalgam of the two previous designs. He also added several minor refinements, including the deletion of the bonnet scoops in favor of an asymmetric bonnet bulge, which allowed the low bonnet to clear the carburetors.

Despite Standard’s financial constriction, a few mechanical changes did make the cut, including new rack-and-pinion steering (with a telescoping, collapsible “Impactoscopic” steering column) and a redesigned four-speed gearbox with a synchronized low gear. These revisions were defensible as production rationalization: The steering was an adaptation of the Herald’s, while the all-synchro gearbox had obvious applications elsewhere in the line. Another significant modification was the standardization of the previously optional 2,138 cc (130 cu. in.) version of the wet-sleeve engine, whose additional torque would compensate for the extra weight of the new body. While helpful, this was not a particularly dramatic change, since the big engine differed from the 1,991 cc (121 cu. in.) four only in the bore diameter of the replaceable cylinder liners; the 2.1-liter version was already optional on the TR3A.

THE TRIUMPH TR3B

Although less elaborate than originally envisioned, the TR redesign was still costly; the tooling alone ran to almost £1 million ($2.6 million U.S.), a lot of money for Standard-Triumph at that point. After the merger was completed the following spring, Leyland management — already alarmed by what they saw as a general lack of corporate thrift — considered various cost-saving measures, including the possibility of abandoning the roll-up windows in favor of side curtains. The board eventually concluded that such revisions would be a false economy and approved the design as was. Now officially called TR4, the new sports car went into pilot production in August 1961, nearly two years behind schedule.

There was one final complication, however, this time from overseas. While one might assume that the TR4’s added amenities would appeal to buyers in the crucial U.S. market, Triumph’s North American distributors worried that their buyers might see the new car as a sign that Triumph had gone soft. Part of the TR3’s appeal to Americans was precisely that it was stark and uncompromising; U.S. buyers who wanted a big, plush convertible had many other options. The possibility of automatic transmission, also floated around this time, received a similarly negative response.

1962 Triumph TR3B front 3q © 2012 Clive Barker per
A rare Triumph TR3B, offered only in 1962 and only for the North American market. Standard-Triumph abandoned early plans to mate the TR4’s chassis to the TR3A body — which is not difficult if the bolt-on fenders are modified to accommodate the TR4’s wider track dimensions — and so the production TR3B was essentially just a TR3A with (in all but the first 500 cars) the TR4’s all-synchro four-speed and the big-bore 2,138 cc (130 cu. in.) engine. (Photo: “1962 Triumph TR3B” © 2012 Clive Barker; used with permission)

The automatic transmission option was not pursued, but Standard-Triumph did agree to continue production of the TR3 for an additional year alongside the new TR4. This was perhaps slightly less inconvenient than it might otherwise have been because the bodies for the two cars were produced at different factories: The TR3’s stampings came from Mulliners (and its Forward Radiator Co. subsidiary) in Birmingham, while the TR4’s body was made at the former Hall Engineering plant in Speke that Standard had purchased in 1959. Bodies were trucked to the Canley-Fletchamstead complex in Coventry for final assembly.

It would have been a simple exercise to mate the old body with the new chassis. In fact, Triumph built two “TR3B” prototypes that did just that, adding wider fenders and a new grille to account for the greater track width. However, the company decided not to go that route, so the actual TR3B was much like the last TR3A, albeit with the new fully synchronized gearbox and the previously optional 2,138 cc (130 cu. in.) engine — a potentially appealing combination for racers.

The TR3B did not actually go into production until March 1962, probably to allow time to clear stocks of leftover TR3As. As it turned out, the TR3B’s career would be very short-lived.

THE TRIUMPH TR4

The Triumph TR4 finally made its public debut in September 1961. In the U.K., it had a basic price of £750, £51 more than the last TR3A, which pushed the price with purchase tax over the £1,000 mark (by £32 5s 3d) for the first time. However, as before, very few TRs were sold in the home market. Most went to the U.S., where the TR4 now listed for $2,849 POE, $174 more than the TR3A (or the TR3B, which did not appear until the following spring). Although the TR4 was more expensive than before, its market position had not really changed: It was still priced roughly halfway between an MGA roadster and an Austin-Healey 3000 Mk II.

1961 Triumph TR4 front 3q © 2010 Mick from Northamptonshire, England (Lumix) (CC BY 2.0 Generic) modified by Aaron Severson
An early Triumph TR4 hardtop, identifiable by the short bonnet bulge; starting sometime in 1962, the bulge was extended nearly to the trailing edge of the bonnet. On the earliest TR4 hardtops the center roof panel, like the rear section, was aluminum, but this was soon changed to steel. Both the hardtop and windscreen were removable, although it was a cumbersome operation and factory hardtop cars did not have a soft top installed. Even so, the hardtop cost about £50 more than the convertible in the U.K., a round $150 extra in the U.S. (Photo: “Triumph TR4 1961” © 2010 Mick from Northamptonshire, England (Lumix); used under a Creative Commons Attribution 2.0 Generic license)

At least on U.S. price lists, there were technically two TR4s: a convertible and a hardtop coupe. The latter was not exactly a separate body style, but a convertible with the folding top deleted in favor of a semi-permanent bolt-on hardtop. (We assume the rationale for offering the hardtop as a separate model was to facilitate racing homologation. Hardtop-equipped TR3s had been allowed to compete in the GT classes rather than as sports cars, a distinction the factory was no doubt eager to preserve.)

The hardtop was a novel two-piece affair, conceived by Michelotti and previously seen on the Zoom prototype. The center roof panel, made of steel on all but the earliest cars, could be detached without removing the rear section or its wraparound glass backlight, giving an effect much like the lift-off roof of the later Porsche 911 Targa. Unfortunately, the center panel was too big to fit in the boot, leaving occupants at the mercy of changeable weather. To cope with sudden showers, a snap-on vinyl panel known as the “Surrey top” was offered as an additional extra-cost option.

With either top, the TR4 had a wider and more comfortable cabin and a larger boot than the TR3. The new car was still a two-seater, but the factory again offered a set of rear cushions that could be installed in the tonneau area behind the front seats, providing at least notional capacity for a small child or a medium-size and reasonably compliant dog. A new ventilation system provided face-level vents, rare in British cars of the era, and a new and more powerful heater was optional. In addition to wind-up windows, there was a much-improved convertible top with a large three-section backlight for better rear visibility.

1961 Triumph TR4 hardtop Surrey © 2012 Clive Barker per
Another 1961 TR4 hardtop, this one with the optional “Surrey” top installed. Modern fans and even some contemporary journalists often refer to the two-piece hardtop itself as the Surrey top, but the factory used that term only for the snap-in vinyl panel, which was an extra-cost option on hardtop cars. (Photo: “1961 Triumph TR4 ‘Surry top’ Roadster” © 2012 Clive Barker; used with permission)

The first indication that the TR4 was still the same familiar brute under its new Italian suit was the ride quality. While the shock absorbers were slightly softer than before and effective spring rates a touch lower (the springs themselves were unchanged), the TR4’s ride remained harsh and choppy enough to threaten directional stability on bumpy surfaces. The TR4 had learned some manners — the steering was sharper than before and the wider track and improved weight distribution made smooth-road handling more nimble than ever — but broken pavement still brought out the Triumph’s thuggish side, a consequence not only of the stiff springs but also of the carryover chassis’ acute shortage of rear wheel travel. Some critics also complained that the quicker steering made the TR4 rather twitchy, particularly given the car’s susceptibility to bump steer.

Some Triumph fans were undoubtedly disappointed to learn that the TR4 was no faster than the TR3A. The 2,138 cc (130 cu. in.) engine now had 105 gross horsepower (78 kW; 100 hp/75 kW net) and 127 lb-ft (172 N-m) of torque, up 5 hp (3 kW) and 10 lb-ft (14 N-m) from the 1,991 cc (122 cu. in.) TR3A, but those increases were neatly canceled by the new body’s slightly greater frontal area and greater weight (up 78 lb (35 kg), according to factory figures). Measured performance was almost unchanged: 0-60 mph (0-97 km/h) in 10 to 11 seconds, a top speed of nearly 110 mph (175 km/h). That was still very good by contemporary sports car standards — drivers of any Porsche 356 other than a Carrera were advised to tread cautiously at stoplights — but not by as commanding a margin as before, leaving some reviewers wondering when the DOHC Le Mans engine would be available. The answer, sadly, was “Never,” although the earlier 1,991 cc (121 cu. in.) wet-sleeve engine was optional for owners looking to campaign their cars in the under-2.0-liter classes.

1962 Triumph TR4 roadster rear 3q © 2014 Greg Gjerdingen modified 2014 Aaron Severson CC BY 2.0 Generic
While the nose of the production TR4 looks like Michelotti’s Zest prototype, the rear fenders and tail combine the basic shape of the Zoom with the Zest’s taillight treatment. (The Zoom-based TRS cars had three free-standing taillight bulbs per side). In convertible form, the TR4 benefited from a new top with large rear quarter panes for better top-up visibility. Although a great improvement over the TR3A, the top was still fussy to erect, so Triumph redesigned it again for the TR4A. (Photo: “1962 Triumph TR4” © 2014 Greg Gjerdingen; modified 2014 by Aaron Severson and used under a Creative Commons Attribution 2.0 Generic license with modifications offered under the same license)

Nonetheless, the Triumph TR4 was still one of the sportiest sports cars available in its price class, offering strong acceleration, nimble handling, and first-rank stopping power. Rivals like the Sunbeam Alpine or Alfa Romeo Giulietta Spider were a little more livable on real-world roads, but neither stood a chance against the Triumph in any sort of direct performance contest. The TR4 also benefited from Triumph’s comprehensive assortment of competition equipment (most TR3/TR3A pieces would bolt on), as well as the optional but commonly installed Laycock de Normanville overdrive. The latter was usable on every forward gear except first, effectively giving the Triumph seven speeds — very handy for rallying. The overdrive could also be ordered with a shorter 4.10 axle ratio (replacing the standard 3.70), also benefiting acceleration.

Even at its peak, the TR4 never quite matched the popularity of the TR3A, but concerns that North American buyers would shy away from the new body proved unfounded. The TR3B, introduced in the spring of 1962, survived only seven months and sold only 3,331 copies, making it very rare today.

RACING THE TR4

In August 1961, shortly before the Triumph TR4 went on sale, Leyland sacked almost the entire Standard-Triumph board and asked for the resignation of Alick Dick, who was promptly replaced by Stanley Markland. An early casualty of the new administration was the factory racing program, shuttered about the time the TR4 debuted. Others included the Le Mans effort and the 20X engine, both of which were deemed too expensive and of limited commercial applicability.

Nonetheless, the TR4 had obvious potential for racing. In 1962, the factory reopened the competitions department, now under the direction of Graham Robson, later to become a well-known automotive writer. The budget was a modest £16,000 (about $45,000), enough for only four TR4s, each painted powder blue. These started off relatively stock, but became progressively less so over the next two years, gaining lightweight aluminum body panels and various engine modifications.

1962 Triumph TR4 roadster © 2014 Greg Gjerdingen CC BY 2.0 Generic
Triumph factory figures give the TR4’s overall length as 153.6 inches (3,901 mm), but most contemporary tests list it as 156 inches (3,962 mm), which presumably includes the bumper guards. Wheelbase is 88 inches (2,235 mm), unchanged from the TR3, but the TR4’s track width is 49 inches (1,245 mm) in front, 48 inches (1,219 mm) in back, about 4 inches (102 mm) wider than the TR3. Curb weight is about 2,240 lb (970 kg) for a convertible with overdrive; hardtop cars were perhaps 25 lb (11 kg) heavier. Note the “long” bonnet bulge on this car, which extends farther back than the “short” bulge on the 1961 cars pictured above. There were actually two variations of the long-bulge bonnet during the TR4’s run, although the distinction is more obvious with the bonnet raised because the under-bonnet bracing and latches are different. (Photo: “1962 Triumph TR4” © 2014 Greg Gjerdingen; used under a Creative Commons Attribution 2.0 Generic license)

The factory cars won a number of team prizes, but the 2.5-liter (153 cu. in.) class had become tougher than before and the TR4’s European rally career was short. By 1964, Standard-Triumph decided it was no longer competitive and withdrew the TR4 in favor of the Spitfire and 2000 saloon.

It was a different story in the U.S., where TR4s were well-represented in Sports Car Club of America (SCCA) competition. The initial impetus came from driver Bob Tullius, who spent weeks lobbying Mike Cook, then Triumph’s U.S. advertising manager, for a TR4 to drive in the 1962 season. Cook and Standard-Triumph U.S. president Martin Tustin eventually agreed, but the factory-provided TR4 was wrecked during a practice session shortly afterward. Since the U.S. organization wasn’t willing to provide a second car, Tullius and his friend Ed Diehl cobbled together a TR4 out of the remains of three different wrecks, which Tullius used to claim the 1962 SCCA E-Production national championship.

1965 Triumph TR4 Surrey top rear 3q © 2013 Steve Glover CC BY 2.0 Generic
A great many surviving Triumph TR4s now sport Minilites or wire wheels, but the latter were an extra-cost option; the TR4’s standard wheels were 4.5×15 steel discs. Radial tires were not standard either, but were a wise choice because the standard bias-ply tires weren’t rated for the TR4’s top speed. Inside, leather upholstery and a wood-paneled dashboard were also optional, as were rear cushions to turn the tonneau area into a rough approximation of a rear seat. Note that in contrast to the TR3, the TR4’s boot lid goes down nearly to bumper height, benefiting loading, but forcing the deletion of the TR3’s separate access door for the spare wheel. (Photo: “Triumph TR4 (1965)” © 2013 Steve Glover; used under a Creative Commons Attribution 2.0 Generic license)

Inspired, Triumph’s North American organization decided to run three cars at the 1963 Sebring 12 Hour, prepared by R.W. “Kas” Kastner. Kastner, who had won the 1959 SCCA F-Production Pacific Championship in a TR3A, had previously been the service manager for West Coast Triumph distributor Cal Sales, becoming Western Zone service manager when Cal Sales was bought out by Standard-Triumph in 1961. Kastner resigned after being told that as a Triumph executive he could no longer compete, but he was lured back by the Sebring project, the cars for which were prepared in Kastner’s home garage in Manhattan Beach, California, south of Los Angeles. TR4s took first, second, and fourth place in their class at Sebring, after which Kastner was appointed the head of a new U.S. competitions department.

Later that year, Bob Tullius drove one of the Sebring cars to another SCCA national championship, this time in D-Production, where the SCCA had recently reclassified the TR4. (Since 1960, the SCCA had classified cars based on relative performance rather than engine displacement, so it was not uncommon for cars to be bumped up or down a class to keep things competitive.) Tullius would repeat that achievement in 1964. Amateur and semi-pro drivers also had great success with the TR4, thanks in part to Kastner’s driver assistance program, which provided small cash prizes to drivers who won or placed in competition to partially offset the cost of tires, fuel, and maintenance.

SIDEBAR: The Dové GTR4

While Standard-Triumph marketed a hardtop version of the Triumph TR4 from the beginning, there was also a short-lived attempt to create a more commodious GT version: the Dové GTR4, marketed not by Triumph, but by L.F. Dove & Company Ltd. in Wimbledon, a major Standard-Triumph distributor.

The Dové GTR4 was a conversion of the standard TR4 with new fastback roof designed and built by Thomas Harrington Ltd., a Sussex-based coachbuilder that normally did most of its work for the Rootes Group. The Dové’s origins are hazy, but it may have been proposed by Harrington design chief Clifford Harrington as a follow-on to the firm’s 1962-1963 Harrington Alpine Le Mans, a fastback conversion of the Sunbeam Alpine. Dove was amenable and the first GTR4s were built by early 1963.

As with the Alpine Le Mans, the GTR4’s new roof was fiberglass with a lift-up rear window for added cargo-carrying versatility. Since the conversion required relocating the fuel filler, Harrington also took the opportunity to add a larger fuel tank. All of this added nearly 400 lb (180 kg) to the TR4’s curb weight, so some GTR4s received mildly massaged engines (a £35 option) and many had the TR4’s optional 4.10 axle with overdrive. Autocar tested a GTR4 in June 1963 and found it slower than a standard TR4 to 60 mph (97 km/h), but quicker at speeds over 80 mph (129 km/h), suggesting that whatever its aesthetic virtues, the new roofline reduced aerodynamic drag.

1965 Triumph Dové GTR4 side © 2010 Robert Grounds/Rally Pix (used with permission)
Harrington made a valiant effort to make the GTR4 a 2+2, but an unchanged wheelbase meant that rear occupancy was still best limited to the short-legged and unusually limber. Although at least one owner has outfitted his GTR4 to resemble a works competition car, historian Jon Marshall, who has studied these cars in detail, insists that the persistent rumor that Dové prepared several cars for an abortive Le Mans run is false. The factory competitions department certainly never campaigned the GTR4, although they did run an unrelated fastback GT version of the Spitfire at Le Mans in 1964 and 1965. (Photo: “Triumph TR Day – 01 – TR4 – Dove GTR4” © 2010 Robert Grounds (Rally Pix); used with permission)

The GTR4’s downfall was its price: £1,093 basic, £1,250 with purchase tax, which did not include the blueprinted engine or other options. That was nearly £300 (roughly $800) more than a TR4 hardtop, which greatly limited sales. The subsequent closure of Harrington’s coachbuilding department nearly finished the project after 1964, but the L.F. Dove organization persisted for two more years, producing a few more conversions on the new TR4A chassis in 1965 and 1966. Total Dové production is unknown, but Hon Marshall estimates that it amounted to around 55 cars, including perhaps 10 GTR4As.

Standard-Triumph was certainly aware of the GTR4, but as far as we know had no serious interest in it. By the time the Dové appeared, the factory was already working on its own fastback GT project, based not on the TR4 but on the smaller Triumph Spitfire. In May 1964, the Standard board decided a six-cylinder version of that car, dubbed GT6, would be Triumph’s answer to the forthcoming MGB GT, a project of which Standard had recently become aware. We assume the main reason Standard did not opt for a GT version of the TR4 was price. At launch, the GT6 cost as much as a soft-top TR4A and only £25 less than an MGB GT; a TR4 GT would undoubtedly have cost substantially more, reducing its sales potential.

9 Comments

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  1. drifting a little off topic …

    About a year ago I was at an informal show (cruise night) parked next to a ’63 TR4. The couple who owned it had purchased new it on their honeymoon in England, the car and the marriage still intact.

    Perhaps one of the longest current ownerships of one of these cars.

  2. I’m looking for a fully restored 1967 Triumph TR4A IRS, overdrive would be nice, convertible and with left hand drive.

    1. Harry,

      I’m afraid I can’t help with buying or selling cars or parts — sorry!

  3. thanks. Nice article. BTW, the TR2 did not have a folding windscreen. Wish it did. It was, however, removable and could be fitted with optional folding brooklands screens.

    1. Thanks for the clarification — I’ve amended the text.

  4. Thanks for the website. My first new car was a 1966 TR4A IRS; British racing green, wire wheels and knock off hubs. It was hot in summer and cold in winter. Wife (no, we) got pregnant and the Triumph got traded off for a 1968 Opel Kadett station wagon. We have a wonderful daughter and 3 grandkids, but I still miss my TR4A!

  5. While the road-going version of the 2.0 DOHC 20X Sabrina prototype engine was said to put out around 120 hp or more (and around 150-200 + hp in race tune), it would have been interesting to find out how much of a power increase a full production Sabrina DOHC engine would have put out had it been equipped with fuel-injection like on the 150 hp 2.5 Triumph I6 PI.

    One question though is how did the 2.0 Sabrina DOHC compare with the 2.0/2.5 Triumph I6 in terms of size and weight?

    And would a production Sabrina DOHC engine have fitted into models like the Triumph GT6 and (pre-Sprint) RWD Triumph Toledo / Triumph Dolomite?

    1. These are excellent questions to which I unfortunately don’t have answers. My guess (which is worth about as much as guesses usually are) is that the 20X was around the same length, a little taller, and probably more or less the same weight as the 1,998cc Triumph six, but my sources didn’t have any specific dimensions or weight figures, so that’s just a very rough guess. If anyone has real numbers, I’d love to see them.

  6. I had a ’63 TR4 and a ’66 TR4A. Drove them across country, including Chicago to LA with all my earthly possessions. Good cars for their time.

    One aspect you might have mentioned: The TR4 had the world’s first Targa top. Porsche copied it for their 911 Targa.

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