20. Triumph TR6
If the Spitfire was Triumph’s roadster for the masses, the TR6 was a car for the serious lover of open-air driving and speed. The Spitfire could be considered underpowered even though it weighed only 1500 lbs., but the TR6 had decent power straight from the box. The TR6 was a successor to TR5 and US-market only TR250, which all shared basic construction, dimensions, and design. The TR6 was introduced in 1968 and featured disc brakes, independent suspension, and a 2.5-liter straight-six engine with 145 HP (via Hemmings).
Thanks to a weight of just under 2200 lbs., the TR6 was agile and was amongst the fastest power roadsters on the market in the late 1960s. Production ended in 1976 after more than 90,000 were made. Today, the TR6 is a popular choice for classic roadster fans who want old-school looks and feel with solid performance and speed. Decent examples can be found for around $20,000.