Triumph 1800 Roadster
It’s impossible to write this without mentioning the Bergerac connection, especially as so many that come up for sale claim to have appeared in the Jersey-based TV detective series. There’s reasonable evidence to suggest that five cars did, but don’t pay a premium for one without checking its provenance. There were 1800 and 2000 versions, the former using a Triumph unit with a four-speed ‘box, the latter adopting more powerful Standard Vanguard running gear, though that means you only get a three-speed gearbox. The stiffer chassis and better brakes make up for it, though.