The Triumph TR6 was a British six-cylinder sports car and the best-seller of the TR range built by Triumph when production ended in July 1976. This record was then surpassed by the TR7. 91,850 TR6s were built. All TR6 sports cars featured inline six-cylinder engines. For the US market the engine was carburetted, as had been the US-only TR250 models engine. For other world markets including England, the TR6 was fuel-injected as had been the non-US market TR5. The Lucas mechanical fuel injection system helped the home-market TR6 produce 150 bhp (112 kW) at model introduction. Later the non-US TR6 variant was detuned to 125 hp in order for it to be easier to drive, while the US-variant continued to be carburetted with a mere 104 hp (78 kW).The TR6 featured a four speed manual transmission. An optional equipment overdrive unit was a desirable feature because it gave drivers close-gearing for aggressive driving, yet "long legs" for open motorways. TR6 also featured independent rear suspension, rack and pinion steering, fifteen inch wheels and tires, pile carpet on floors and boot, bucket seats, and a full complement of instrumentation. Braking was accomplished by disc brakes in the front; drum brakes in the rear. A factory steel hard top was optional. TR6 construction was fundamentally old-fashioned: the body was bolted onto a frame instead of the two being integrated into a unibody structure; the TR6 dashboard was wooden (plywood w/ veneer).