The Ford Sierra RS, including the iconic RS Cosworth variant, represents a significant chapter in performance automotive engineering from the 1985-1987 production years. Known for its distinctive aerodynamic styling and potent engine options, particularly the turbocharged Cosworth YB unit in the RS Cosworth models, this vehicle was designed for both enthusiast driving and motorsport homologation. Its robust chassis, rear-wheel-drive dynamics on the RS Cosworth, and advanced (for its time) suspension systems contributed to its acclaimed handling and performance, making it a formidable competitor in its segment and a highly desirable modern classic.

This comprehensive factory service manual provides in-depth technical information for the Ford Sierra RS and compatible standard Sierra models. It covers essential maintenance procedures, detailed engine and transmission repair, suspension and brake servicing, electrical system diagnostics, and body repair techniques. The manual is designed to assist owners, technicians, and mechanics in understanding, maintaining, and repairing these vehicles, offering factory-level specifications, troubleshooting guides, and information on special tools required for complex tasks, ensuring the longevity and optimal performance of your Sierra RS.