This is it, the car which started it all. BMW’s Z1 was the first of the Z family of roadsters. Although it’s the least famous of the bunch, it was a predecessor to the iconic Z3, a car which owes its existence to the Z1. Introduced back in 1987 as a concept car by the German carmaker’s newly-founded BMW Technik GmbH division to showcase the new direction BMW wanted to take.
While the BMW Z1’s styling is unique in itself, there is nothing quite like it when it comes how the doors were made. Rather than opening outwards, they simply retract inside the body electronically. To date, the Z1 is the only roadster with this quirky feature. What’s more, the windows can be opened individually of the doors, but they do retract if the door is completely retracted inside. Although it’s probably not legal in a lot of countries, one could drive the BMW Z1 with the doors completely inside the body