Butterfly doors may be the most beautiful of them all, and there are a few visually titillating vehicles that show why The layout allowed the car to ride around four inches lower than BMW's other ...

But the market never took to it. And it was a shame. The power density of the PHEV was on par with BMW's most powerful road ...

This BMW 2+2 is widely expected to deliver a ... and possibly operation – the concept car featured elongated butterfly doors that afforded accesses to both the front and rear seats.