The car was characterised by its "wedge" shape, which was commonly advertised as: "The Shape of Things to Come", and by a swage line sweeping down from the rear wing to just behind the front wheel. The design was penned by Harris Mann who also designed the wedge-shaped Princess. The car had an overall length of 160inches (406cm), width of 66inches (168cm), wheelbase of 85inches (216cm) and height of 49.5inches (126cm). The coupé had a kerbside weight of 2205 pounds (1000kg). During development, the TR7 was referred to by the code name "Bullet". Original full size model wore MG logos because it was styled at Longbridge, which was not a Triumph factory.[citation needed]
Power was provided by a 105bhp (78kW) (92bhp or 69kW in the North American version) 1,998cc eight-valve four-cylinder engine that shared the same basic design as the Triumph Dolomite Sprint engine, mounted in-line at the front of the car. Drive was to the rear wheels via a four-speed gearbox initially with optional five-speed manual gearbox, or three-speed automatic from 1976. The front independent suspension used coil spring and damper struts and lower single link at the front, and at the rear was a four-link system, again with coil springs. There were front and rear anti roll bars, with disc brakes at the front and drums at the rear.