Why does the Audi A7 use a single-turbo engine instead of a twin-turbo engine?

I've noticed that most luxury sedans similar to the Audi A7 use a twin-turbo engine, but the A7 has a single-turbo engine. What is the reason for this difference and how does it affect the car's performance?

The Audi A7 uses a single-turbo engine in order to achieve better fuel efficiency and emissions standards without sacrificing too much power. While a twin-turbo engine may have more horsepower, the single-turbo engine still provides more than enough power for everyday driving.

From my experience, the single-turbo engine in the Audi A7 offers a smoother and more linear performance compared to twin-turbo engines. This translates to a more enjoyable driving experience and better handling on the road.

Audi has specifically designed the single-turbo engine for the A7 in order to optimize performance and efficiency. The engineering team at Audi has determined that a single-turbo setup would be the most beneficial for this particular car.