Mercedes-AMG has unleashed a new beefed-up R version of its GT supercar. Making its public debut at Goodwood, the new Merc is powered by a 4.0-litre, V8 engine with 585bhp for a 0-62 time of 3.6 seconds, and a top speed of 198mph. Finished in a Nurburgring-inspired ‘Green Hell’ paintwork, the new GT R features a wider track, modified suspension, new aerodynamics front and rear and a lightweight construction - all designed for maximum driving dynamics.