2011 Audi E-Tron Concept Cars

The e-tron Spyder rides on a 95.7-inch wheelbase, which is 8.7 inches shorter than that of the R8. At 159.8 inches long, 71.3 inches wide, and 43.7 inches tall, it's slightly larger than the hardtop e-tron shown in January at the 2010 Detroit Auto Show but still considerably smaller than an Audi TT.Design-wise, the e-tron Spyder is similar to the Detroit car, but with a more aggressive look