14. Triumph TR6
The TR6 was a successor to the TR5 and US-only TR250. They 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. Thanks to its weight of just under 2200 lbs, the TR6 was agile.
It was among the fastest power roadsters on the market in the late ’60s. Production ended in 1976 after more than 90,000 were made. Today, the TR6 is a popular choice for classic roadster fans that want old-school looks and feel but with decent performance.