It's a battle for German sports car supremacy as the Audi RS4 gets pitted against the BMW M5 in a series of tests. In the video that you can view below, Inside Line puts these two Autobahn-carving four-wheelers to the test. They found that the Dynamic Stability Control (DSC) system on the Bimmer hurt some of its ratings, but would that be enough for the RS4 to take the lead?
