Ford Sierra RS500

Another prominent figure in the RS Cosworth development was Ruedi Eggenberger of Eggenberger Motorsport. The crack Swiss outfit was selected by Ford to run the Works team and the resulting black Texaco backed cars were the cream of the Touring Car crop. An expert with forced induction motors after success with the turbocharged 240 Volvos, Eggenberger immediately realised the potential of the Sierra RS Cosworth. At the same time he was also very aware that the standard equipment on the cars was not up to the job when it came to ruling the Gp.A roost. Early in the RS Cosworth programme, Eggenberger held discussions with Stuart Turner and Ford Motorsport Europe technical experts on how they would best use the 'Evolution' rule within the Gp.A regulations. The end result of these talks was the definition of the specification of the 500 evolution variants of the RS Cosworth, later to be come known as the Sierra RS 500 Cosworth. Essentially, the RS500 was an Eggenberger creation in all but name. Ford then had to build 500 Sierras with the neccessary high performance parts fitted for road use. Only then could the race cars have these parts fitted to unleash the extra performance. Ford st