The "Ring" in Germany has been the benchmark testing ground for automotive speed for decades. they race several classes there all the time. but of production cars that you can buy for street use only one car at a time can be on top. so who is the current king? the 427 Z- 28? the Nissan GTR?nope the fastest production car in the world is a hybrid!! watch this Porsche fly around the ring in a sub 7 minute run
https://www.youtube.com/watch?v=2Yz8cizr6sI&src_vid=Bc9UUPNaOzE&feature=iv&annotation_id=annotation_533205663