This manual covers the Ford Sierra RS models, including the RS Cosworth and RS500 variants, produced between 1985 and 1987. These performance-oriented vehicles, built by Ford's Special Vehicle Engineering department for Group A racing homologation, are renowned for their dynamic capabilities and potent turbocharged Cosworth engines. The Sierra RS represented a significant step in Ford's performance lineage, offering advanced engineering for its time, including sophisticated fuel injection systems and robust drivetrain components. This manual is designed for enthusiasts and professionals alike who seek to maintain and restore these iconic vehicles.

This comprehensive service repair manual provides detailed instructions and specifications for all major systems of the Ford Sierra RS. Coverage includes in-depth engine repair for the 2.0L Cosworth and 2.8i V6 variants, transmission servicing, brake and suspension system maintenance, and complete electrical system diagnostics with detailed wiring diagrams. It also covers routine maintenance procedures, troubleshooting common issues, and rebuilding major components. The purpose of this manual is to equip owners and technicians with the authoritative, factory-level information necessary to ensure the optimal performance, reliability, and longevity of these celebrated performance Fords.