12. BMW Z1
The BMW Z1 stands out thanks to its remarkable doors, which slide downward into the car’s sills instead of opening outward. Produced in the late 1980s in limited numbers, the Z1 also sported easily removable plastic body panels, allowing owners to change its look.
This roadster’s innovative engineering and futuristic design have turned it into a coveted collector’s item—an enduring symbol of BMW’s willingness to push boundaries.
See BMW Z1 at Car and Driver