The Audi Avus Quattro Concept car is definitely out of this world with its UFO-like design. The vehicle boasts a body that’s completely made of pure aluminum, which gives it an unconventional look. Interestingly, the Avus doesn’t have any paint or wrap to give it color; instead, it gets its polished appearance from the aluminum body itself. What makes this concept car even more extraordinary is its W12 engine, adding to its uniqueness.