Autocar Drag Day: Mercedes-AMG E 63 S vs 740hp Audi RS6 Avant Drag race video

For decades now, German luxury carmakers have been stuffing super-powerful engines into their four-door family or executive cars. As this horsepower race reaches new highs, we thought we'd compare two examples - a stock Mercedes-AMG E 63 S and a highly tuned Audi RS6 Avant. We show you which is quicker down the quarter mile.