Gordon Robertson is back. Having previously tamed the GT3, the chief driving consultant of the Porsche Experience Center at Silverstone now takes on another of Stuttgart's iconic 911s: the GT2 RS.Capable of 620 hp and 700 Nm (516 lb-ft) of torque, the 911 GT2 RS is the most powerful road-going Porsche ever built. It accelerates from standstill to 100 km/h (62 mph) in just 3.5 seconds and hits the