Subscribe to the channel now: http://smarturl.it/autocar It's the battle of the performance coupes as BMW's new M4 takes on the Mercedes-Benz C63 AMG. Can the M4's turbocharged 425bhp six-cylinder petrol engine compare to the 6.2-litre V8 of the C63 AMG? Steve Sutcliffe has the keys to both, and he's about to find out. Autocar, the world's leading motoring magazine and website, delivers industry-l
Autocar@youtube
play video