15. Triumph GT6
The GT6 project began in the mid-’60s when Triumph realized they needed a coupe version of their popular roadster. However, just putting a roof on a Spitfire wouldn’t do the trick. They needed to re-engineer the car and add a more powerful engine so the chassis could cope with the added weight. So Triumph engineers installed a 2.0-liter six-cylinder engine producing 106 HP. It provided the GT6 with more power and performance than the Spitfire.
Triumph officially presented the GT6 in 1966 and discontinued it in 1973 after producing approximately 45,000. The GT6 was never as popular as the Spitfire, but it was arguably a better car. It was also a cool-looking alternative to the other sport coupes on the market.