Audi R8 E-tron 'great concept for the year 2013'

Audi R8 E-Tron is a super car concept that is planned to be launched in 2013, is really a complex concept but audi earnest to realize this great concept. starting from a very different concept of machines to development of electric R8. R8 E-tron by Audi wants to change the look and feel of a vehicle.
Audi R8 engine E-tron is very unusual, because this car uses 4 motors for propulsion: 2 motors