[Video] BMW M5 v Audi RS6 v AMG E63 v Porsche Panamera

Carwow got their hands on the all-new Audi RS6 and they’re testing it against three other German powerhouses, including the BMW M5! All four contenders are packing 4-liter V8 engines (apart from the M5 Competition which has a 4.4-liter engine), and their performance stats are almost identical! With this in mind, you’d think they’d be neck-and-neck once they cross the finish line… But will they?! Or does Audi’s all-new performance wagon have the edge?