2018 Audi RS4 Wagon Commercial Germany

The RS4 Avant is mechanically similar to the RS5, with those two sharing many components—most notably the awesome 450-hp 2.9-liter V-6, which is a twin-turbocharged variation of the S4 sedan’s single-turbo 3.0-liter engine. This powerplant springs from an engine-development partnership with Porsche in which Audi handles the V-6s and Porsche the V-8s. You can also find it installed in the Porsche Panamera S and the upcoming next-gen Cayenne S.