The Triumph TR6 was the most popular product offering in the TR range by the time production ended in mid-1976. All TR6s featured the bulletproof inline six-cylinder engines which put out a respectful 106 horsepower. The TR6 featured a four-speed manual transmission with optional overdrive, which lent itself to long cruises on rolling country roads or higher-speed motorway travel.
The bodywork closely resembled that of the previous model, the Triumph TR5, but the front and back ends were squared off, reportedly based on a consultancy contract involving Karmann.
All TR6 sports cars featured inline six-cylinder engines. For the US market the engine was carburetted, as had been the US-only TR250 engine. Like the TR5, the TR6 was fuel-injected for other world markets including the United Kingdom, hence the TR6PI (petrol-injection) designation.
The Lucas mechanical fuel injection system helped the home-market TR6 produce 150 bhp at model introduction. Later the non-US TR6 variant was detuned to 125 bhp (93 kW) in order for it to be easier to drive, while the US variant continued to be carburetted with a mere (but more reliable) 104 hp.
This car was auctioned off by RM Auctions in July of 2011 at The Inn at St. John's, Plymouth, Michigan.
Sources: RM Auctions and Wikipedia, 2011; Mecum Auctions as part of the Kansas City event in December, 2014