The 2013 Audi R18 e-tron Quattro varies from the 2011 Audi R18 already in game in aerodynamics through use of winglet extensions over the rear wheel openings and, in the case of the "long-tail" version, the inclusion of an exhaust-blown diffuser. Th e-tron Quattro also has an AWD hybrid drivetrain which engages the KERS automatically through application of the accelerator at speeds of 120 kph (75 mph) or higher.
