How does the Audi R8 save fuel?

I'm interested in learning about the fuel-saving technology used in the Audi R8. Can you tell me more about it and how it compares to other sports cars on the market?

The Audi R8 uses a start-stop system which automatically turns off the engine when the car comes to a stop, saving fuel in traffic or at stop lights.

Additionally, the R8 features a cylinder on demand system which shuts off half of the engine's cylinders when less power is needed, further reducing fuel consumption.

Compared to other sports cars in its class, the Audi R8 has excellent fuel efficiency thanks to its lightweight construction and advanced engine technology.