R8 e-tron (Germany, 2009)

The Audi R8 e-tron is a high-powered sports car which is powered only by electric energy. The concept car is fitted with four engines that provide a total power of 230 kW (313 hp). These engines can be individually actuated, in an entirely new developmental stage of the permanent four-wheel drive.

The concept counts with four asynchronous motors, two each on the front and rear axles, making it a quattro vehicle. The power is brought to the wheels through a single-staged transmission and short input shafts. It features a power output of 313 hp and torque of 4500 Nm, available from standstill. The R8 e-tron is able to accelerate from 0 to 100 km/h in just 4.8 seconds.

Thanks to the location of the large, fluid-cooled lithium-ion battery and the power electronics, behind the passenger compartment, the R8 e-tron has an optimal center of gravity and a load distribution of 42:58 between the front and rear axles, the same as the series production R8 with its 5...