2010 Detroit Auto Show: Audi Unveils New E-Tron Concept

Audi's e-tron electric supercar concept has already been through two iterations--or, rather, one. With two different-colored R8-styled show cars, Audi hit the Frankfurt and Los Angeles Auto Shows hard. Now they've brought a third color and a new more cab-rearward layout to the car. With the mid-engine proportions gone--this is an electric car...