Triumph · 1974–1981

Triumph TR7

The Triumph TR7 is a sports car that was manufactured in the United Kingdom from September 1974 to October 1981 by British Leyland Motor Corporation (BLMC), which changed its name to British Leyland (BL) in 1975. The car was launched in the United States in January 1975, with its UK home market debut in May 1976. The UK launch was delayed at least twice because of high demand for the vehicle in the US, with final sales of new TR7s continuing into 1982. It was initially produced at the Speke, Liverpool, factory, moving to Canley, Coventry, in 1978 and then finally to the Rover Solihull plant in 1980.

Text from Wikipedia (CC BY-SA 4.0).

Predecessor: Triumph TR6

All Triumph TR7 data: UK builds, safety, recalls, model years →

Design and features

The car, characterised by its "wedge" shape and by a swage line sweeping down from the rear to just behind the front wheel, was commonly advertised as "the shape of things to come". The design was penned by Harris Mann who also designed the wedge-shaped Princess. The car has an overall length of 160 in (410 cm), width of 66 in (170 cm), wheelbase of 85 in (220 cm) and height of 49.5 in (126 cm). The coupé has a kerbside weight of 2,205 lb (1,000 kg). During development, the TR7 was referred to by the code name "Bullet". MG branding was considered for the upmarket versions compared to the TR badged entry level versions, with "MG Magna" being used on some of the early clay models, but this did not reach production. The TR7 was the first of Triumph's 'TR' line to not be offered as a convertible in its initial form, instead using a 2-door coupé configuration. With the United States showing increased concern for automotive safety in the 1970s, legislation was being considered to ban open roof convertibles due to rollover risks. As the US statistically represented the most lucrative market for Triumph sports cars, BL decided to avoid these potential risks by offering the TR7 only as a fixed roof coupé. The legislation to ban convertibles was not implemented and in 1979, Triumph introduced a convertible version of the TR7. Power is provided by a 1,998 cc eight-valve four-cylinder engine that shares the same basic design as the Triumph Dolomite 1850 engine, albeit increased to 2 litres and fitted with larger carburettors, mounted in-line at the front of the car. Power is 105 bhp (78 kW) at 5,500 rpm, maximum torque is 119 lb⋅ft (161 N⋅m) at 3,500 rpm, the North American version produces 92 bhp (69 kW). Australian buyers received the same version in order to meet local emissions

Variants and derivatives

=== TR7 drophead coupé === Because of proposed US legislation on roll-over protection at the time of its launch, the TR7 was not initially available as a convertible. In early 1979, Triumph belatedly introduced a convertible version, called the "TR7 drophead coupé" (DHC), which first went on sale in the US (the original hardtop model being known as the "fixedhead coupé", or FHC). A small number of pre-production cars were manufactured at Speke in 1978, soon after the pre-production TR7 V8 (later designated TR8) and TR7 Sprint cars. The British market received it in early 1980. The prototype for the convertible version of the original Harris Mann design came from Michelotti and the engineering to make it work was done by Triumph. TR8. For export to the US market, Triumph created a much more powerful Triumph TR8 model in 1977/78, which was a TR7 with a 135 bhp (101 kW) 3.5 L Rover V8 engine. While some genuine TR8 models stayed in Britain, these examples are exceedingly rare. Most TR8s went to the US, where they did not fare well, owing to Triumph's poor build quality at the time and the unusually strong pound, which peaked at around $2.40 by 1980, making Triumphs fairly expensive compared to competitors. The TR8 was only launched as a convertible (DHC) model. However, about 400 hard-top (FHC) TR8s were produced at Speke and Canley, as these were needed (possibly with some TR7s converted by BL to TR8 specification) for the Group 4 homologation of the TR7V8 rally car. Spider. In 1980, a limited-edition version of the TR7 Drophead was launched for the US market by the US importer. Called the "TR7 Spider", it was available only in "maraschino black", with reflective red striping and badging plus black interior trim. Alloy wheels and the steering wheel from the TR8 were fitt

Motorsports

British Leyland ran a team of TR7s in rally competitions from 1976 to 1980. These cars initially used the 16-valve Dolomite Sprint engine and later switched to the Rover V8 engine (before the introduction of the TR8, so dubbed "TR7 V8"). They were reasonably successful on tarmac events but were less successful on gravel sections. The most successful driver of these cars was Tony Pond. John Buffum won the SCCA PRO Rally Championship from 1977 to 1980 driving TR7 and TR7 V8 cars. The TR7-V8 models continue to be successful in classic rallying events. The 16-valve engined TR7 rally car was homologated for group 4 in October 1975, well before any 16-valve TR7 Sprints are known to have been produced. This was possible at the time using the "100-off rule", as John Davenport called it, in the FIA's appendix J to the International Sporting Code 1975. This 100-off rule described a list of "Optional equipment which may be recognized with a minimum production of 100 units per year to equip 100 cars" and requirements for their use. However, it did not require that any cars actually be so equipped, just that 100 of the "bolt-on option kits" be produced, listed, and made available for sale. As well as alternative cylinder heads with different numbers of cams and valves, this list of optional equipment also included many other engine, suspension, and transmission components, and so covered the use of the 4-speed, close-ratio gearbox and overdrive from the Triumph Dolomite Sprint (the heavy duty axle from the 5-speed TR7 was initially homologated for group 3 by another, less clear, route, though re-homologated later, presumably on production of 5-speed TR7s). Further modifications, including the larger front brakes and rear disk brakes, were covered as "Optional equipment which may be

Quality problems

Quality problems tended to undermine the car's image in the marketplace. This was primarily the result of the poor relations between management and workforce and frequent strikes at the Speke factory near Liverpool. Quality improved when production was moved to the Canley plant in Coventry, and later Solihull. However, it was too late to save the car's reputation. In its Frankfurt Motor Show preview edition of September 1977, the German magazine Auto, Motor und Sport reported that the engine of a TR7 press car had given up the ghost and "started to boil" while undergoing a maximum speed measurement exercise over a 4 km (2.5 miles) stretch of track as part of a road test. At the time of the report, the cause of the problem was still unknown; British Leyland technicians had already been investigating the car, without comment, for nineteen days.

Production volumes

In total approximately 115,000 TR7 models were built which includes 28,864 soft top/convertibles, and approximately 2,800 TR8 models. By the late 1970s, sports cars were becoming a low volume niche product that British Leyland could ill-afford to support, given its volume car business was already struggling. A rationalisation plan introduced by incoming BL chairman Michael Edwardes saw the TR7 put on life support by axing the MG MGB as it was felt that the latter was cannibalizing the TR7's sales - however this controversial decision failed to revive the TR7's fortunes when it too was axed in 1981, with the end of car production at Solihull, which was to become exclusively a Land Rover plant. The demise of the TR7 (and the Dolomite a year earlier) marked the end of the lineage of Triumph sports cars, with the marque continuing on the Triumph Acclaim until 1984. However, the Acclaim was a licence-built Honda Ballade, built at the Cowley assembly plant and was pitched as a family saloon rather than as a sports car.

Sections adapted from Wikipedia (CC BY-SA 4.0); text is shortened. Read the full article for the complete history and citations.

Specifications

sp: uk
name: Triumph TR7
Production: September 1974 – October 1981, 112,368 (TR7 coupé/hardtop), 28,864 (TR7 cabriolet/roadster), 2,497 (TR8)
Manufacturer: Triumph (British Leyland)
Class: Sports car
Layout: FR layout
Predecessor: Triumph TR6
Transmission: 4-speed manual, 5-speed manual, 3-speed automatic
Related: Triumph TR8
Engine: 1998 cc I4
Body style: 2-door roadster, 2-door coupé
Wheelbase: 85 in
Length: 160 in
Width: 66.2 in
Kerb weight: 1101 kg (coupé)
Height: 50 in (coupé)
Assembly: United Kingdom:, Speke, Liverpool (1974–1978), Canley, Coventry (1978–1980), Solihull (Solihull plant: 1980–1981)
Designer: Harris Mann

Specification summary from Wikipedia (CC BY-SA 4.0). Measured facts from Wikidata (CC0). Check the linked sources for citations.

More photos

Sources

Wikidata — https://www.wikidata.org/wiki/Q1670065CC0 1.0 · retrieved 2026-10-01
Wikipedia — https://en.wikipedia.org/wiki/Triumph_TR7CC BY-SA 4.0 · Text © Wikipedia contributors; revision 1346312672 · retrieved 2026-10-01
Wikimedia Commons — https://commons.wikimedia.org/wiki/File:1975_Triumph_TR7_3.5_Front.jpgCC BY-SA 4.0 · Photo: Vauxford · retrieved 2026-10-01
Car Model Index — https://models.autoculturesociety.com/Compiled record. Sources that do not permit reuse are not copied; this index is credited instead.