9. Triumph GT6
The GT6 project was started in the mid-`60s when Triumph realized that they needed a coupe version of their popular roadster. However, just putting the roof on Spitfire wouldn’t do the trick. They needed to extensively re-engineer the car and add a more powerful engine in for the chassis to cope with the added weight of the coupe body style. So, Triumph engineers installed a 2.0-liter six-cylinder engine with 106 HP and provided the GT6 with more power and performance than the similar Spitfire.
The GT6 was officially presented in 1966 and discontinued in 1973 after around 45,000 examples were produced. The GT6 was never as popular as the Spitfire but it was arguably a better car and a pretty cool-looking alternative to all other sport coupes on the market.