How does the Audi A2's corrosion-proof aluminum body affect its weight and fuel efficiency?

I've heard that the Audi A2 uses aluminum for its body material, but I'm not sure how this impacts the overall performance of the car. Does having an aluminum body make it lighter and more fuel efficient, or are there other factors at play?

Using an aluminum body definitely makes the Audi A2 lighter, which in turn improves fuel efficiency. The weight reduction allows for a more efficient use of the engine's power.

While aluminum does make the A2 lighter, it may not have a significant impact on fuel efficiency compared to other factors. By focusing on aerodynamic design and engine technology, Audi has still managed to achieve great fuel efficiency even with a slightly heavier body.