http-//www.carkhabri.com/carmodels/audi/audi-r8 - The Audi R8 mileage is quite decent. However, Audi R8 being a sports car one could not expect high class mileage, but still the engines are so tuned that it does give out a decent mileage. Two engine options are provided with Audi R8, one being 4.2 Litre FSI Quattro and the other being 5.2 Litre FSI. Both the engines are successful in delivering high power and torque and have been mated with S Tronic automatic gearbox that gives the car great speed and helps it to churn out a decent mileage as well. With 4.2 litre FSI Quattro, the mileage ranges from 7 to 8.5 km per litre, whereas with 5.2 litre FSI engine, the fuel economy lands around 4.5 to 9.0 km per litre. Therefore, if you can excuse the mileage and give weightage to speed, then Audi R8 could turn out to be a perfect sports car for you.