Why does the Audi A8 have an aluminum frame?

I've noticed that many high-end luxury vehicles, including the Audi A8, use aluminum frames instead of steel. Is there a particular reason for this?

Aluminum is lightweight yet sturdy, making it the perfect material for high-performance vehicles like the Audi A8. It also offers better fuel efficiency and handling compared to steel frames.

The use of aluminum in the frame also helps to reduce the overall weight of the vehicle, resulting in better acceleration and braking. As for the choice of aluminum over other materials, it offers a good balance of strength and weight at a relatively lower cost.