How does the Audi A7 engine differ from other luxury car engines?

I've heard that the Audi A7 has a unique engine that sets it apart from other luxury cars. Can you explain the differences?

The Audi A7 has a turbocharged engine which provides more power and torque compared to traditional engines used in luxury cars. This allows for a smoother and more exhilarating driving experience.

The Audi A7 engine uses a unique start-stop system which shuts off the engine when the car is idling, helping to conserve fuel and reduce emissions. This feature is not commonly found in other luxury cars.