Audi A1 12 kWh e-tron

The A1 e-tron is a prototype version of the new A1 hatchback and can probably be awarded the title of the first true 'range extender' electric car.It is powered primarily by an electric motor driving the front wheels, powered by a small battery pack. However, when the battery is exhausted, a tiny Wankel engine (mounted under the boot floor) kicks in and drives a generator, which, in turn, powers