This is the one you're been waiting for. What happens when you race the new 2018 Audi RS5 3.0-litre V6 twin turbo against the new BMW M4 C 3.0-litre twin turbo and a 4.0-litre twin turbo V8 Mercedes-AMG C63S over a standing 1/4 mile drag race. Well watch the video to find out. Obviously the Audi as qauttro all-wheel drive so has an advantage off the line. But will it be enough to keep it ahead. Also what happens in a rolling race from 50mph? In this video all these equations will be answered. Also we have a guest driver with us - Paul Wallace from Supercars of London. BTW don't worry - a full review of the RS5 is coming soon.Awkward haggling is a thing of the past with carwow. Choose your perfect car with our configurator tool and let the country’s best dealers compete over you. Compare the five best offers by price, location and dealer ratings and choose the one that’s right for you – no hassle, no haggling, just a great deal.Visit our site to save money on your new car – Visit Paul's channel: supercarsoflondon