Question: what is a yb engine?
Answer: The YB series of 1,993 cc (121.6 cu in) engines are based on the older Pinto engine block, and were introduced in the road-going Ford Sierra RS Cosworth in 1986 with 204 PS (150 kW; 201 bhp). With 5,000 units built for homologation purposes in Group A, both for rallies and touring cars.