Here's an awesome race between an ABT Audi RS6 and a Kawasaki Ninja ZX-10R. Even though this race takes place on public roads, the highway you see here is a derestricted section of the German Autobahn. This means there is no speed limit here. Even so, the two vehicles reach speeds of over 290 km/h, which is dangerous in any situation. Apparently, this particular ABT Audi RS6 develops around 700 hp. The Kawasaki and the Audi race each other between Augsburg and Munich, which is distance of around 50 km (31 miles). The clips description says they have covered it in less than 15 minutes with an average speed of 133 mph (215 km/h).
