Audi S8. Porsche Panamera Turbo. Mercedes-Benz E63 AMG. Porsche Panamera S. All of these sedans have the outrageous performance to back up their price tags, but which one is number one at the track?

That's what Best Motoring sought to figure out, and for funsies, they tossed in a Porsche 911 4S to show how the super sedans would fare against a true sports car. Which one comes out on top in this rare Japanese car-free battle?