Group B - Group S

As well as the cancellation of Group B, the tragedies of 1986 also brought about the scrapping of Group B's proposed replacement: Group S.

Group S rules would have limited car engine power to 300 hp (225 kW). To encourage innovative designs, ten examples of a car would have been required for homologation, rather than the 200 required for Group B. By the time of its cancellation, at least three Group S prototypes had been built: The Lancia ECV, the Toyota MR2-based 222D, and the Opel Kadett Rallye 4x4 (aka Vauxhall Astra 4S), and new cars were also planned by both Audi (the 002 Quattro) and Ford (a Group S development of the RS200). The cancellation of Group S angered many rally insiders who considered the new specification to be safer than Group B and more exciting than Group A.

The Group S concept was revived by the FIA in 1997 as the World Rally Car specification which, as of 2011, is still in use. WRC cars are limited to 300 hp (220 kW) and require 20 examples of a model but, unlike Group S, are required to share certain parts with production cars.

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