18. Peel P50
This obscure micro car from England become famous when they featured it in an episode of the Top Gear TV show. But there is more to the Peel P50 than just making fun of this vehicle. They offered it from 1962 to 1965. The P50 was the smallest passenger car in the world, which is an unbeaten record.
The P50 was basically a single-seater with a Plexiglas body around it and a tiny motorcycle engine powering the rear wheel. Even so, the P50 has some performance, so driving such vehicle must be quite an experience.