If you want to do a speed test, then don’t just assemble an arsenal of the best cars in the world, but assemble those cars that were tuned by some of the best companies in the world. In this speed test, the following cars where tested: Porsche, BMW, Mercedes- Benz, Lamborghini,Audi, VW and Opel. Represented by the following tuning companies: Techart, Speedtec, 9ff, Brabus, AC Schnitzer, Edo competition, Hohenester and Enco. Just amazing to watch those cars fly around the track. Enjoy!