Why does the Audi A8 have a V-8 engine?

I noticed that most luxury sedans have V-6 engines, but the Audi A8 has a V-8 engine. What is the reason behind this design choice and how does it affect the performance of the car?

The V-8 engine in the Audi A8 provides more power and performance compared to a V-6 engine. The extra cylinders allow for better acceleration and higher top speeds.

A V-8 engine also provides a more refined and smooth driving experience in the Audi A8. The increased power helps to maintain a consistent and comfortable ride even at high speeds.