What car is the fastest? That will always be the hottest topic in the automotive industry. In the past it was about top speed and the 0-60 acceleration, but in today's day and age we measure performance in many other ways. The quarter mile, 0-120 mph, lap on the Ring and the 0-400-0 are all measurements that count today. In this speedtest the battle is between "family" cars with 600+ hp, the Mercedes-AMG E 63 S Estate, Audi RS6 Avant C7, BMW M760Li and the Tesla Model S P100D.