Why is the Audi A8 equipped with a V6 engine instead of something larger?

I've noticed that many luxury cars have much larger engines, so why does the Audi A8 only have a V6?

The Audi A8's V6 engine may seem small compared to other luxury cars, but it is designed to be more efficient and still provide strong performance. Plus, it helps keep the price of the car more reasonable.

One of the main reasons for using a V6 engine in the Audi A8 is to reduce the weight of the car. This leads to better handling and fuel economy.