C 63 AMG Coupe Edition 507 vs Audi RS5 by MotorTrend
26 Feb 2014, 15:00 UTC · By: Alex Oagana / With less than a year until the legendary M156/M159 family of AMG engines will become just a part of automotive history and will no longer be available in a new Mercedes-Benz car, the only way you c...