As we told you last month, legendary racing driver Walter Rohrl will be returning to Colorado this July to relive his Pikes Peak success from 25 years ago. If that’s not enough, Mr Rohrl’s mode of transport will be the actual 441 kW (591 hp) Audi Sport quattro S1 that he piloted to victory on the day. Part of this iconic car’s preparation sees the Audi Sport Team’s Thomas Bauch and Frank Friedmann placing it in an altitude chamber to simulate the thinning air experienced at 4,000 metres. We’re really hoping that this is the first of many videos from Audi.