When it comes to cars that deliver pure driving pleasure, the Caterham Seven is tough to beat. Maybe this is why the roadster has used the same recipe for more than 50 years. Caterham has been working to improve it since 1973, but we mustn’t forget that Colin Chapman, who built the first Lotus 7 in 1957, penned the Seven. It’s true that the technology behind it has changed over the decades, but Chapman’s iconic "simplify, then add lightness" philosophy remained printed in the Seven’s DNA. Caterham sells a host of iterations nowadays, ranging from the bone-stock 165 model to the lightning-fast 620 R, but, from time to time, it also releases special-edition models that become prized collectibles.