On this episode of Head 2 Head presented by Tire Rack (), Jonny Lieberman and brand-new host Jethro Bovingdon head to Wales to have a look at new versions of two of the most legendary high-performance coupes around, the AMG C63 and Audi RS5. When these two first battled on Head 2 Head four years ago, the mighty Merc’s superior feel was enough to overcome the Audi’s performance advantage. This time out, both cars have gained twin turbochargers and shrunk in displacement, but the Audi has lost two cylinders.