This comprehensive service manual delves into the intricacies of the Lancia Delta HF and HF Integrale Turbo 4WD, providing detailed information for those seeking to understand and repair their vehicle. The manual encompasses a wide range of technical data, covering both the 8V and 16V engine variants, as well as the Evolution 1 (Evo 1) model. Within the manual, you will find detailed descriptions and diagrams for: * **Engine:** Explore the technical specifications, operation, and maintenance procedures for both the 8V and 16V engines. * **Clutch:** Gain insights into the operation and maintenance of the clutch system, ensuring proper performance and longevity. * **Gearbox and Differential:** Understand the workings of the transmission and differentials, crucial components for drivability and power delivery. * **Propshaft:** Learn about the design, function, and maintenance of the driveshaft, connecting engine power to the rear wheels. * **Rear Differential:** Explore the technical aspects of the rear differential, responsible for distributing power to the wheels. * **Braking:** Acquire knowledge about the braking system, ensuring safe and effective stopping power. * **Steering:** Discover the components and operation of the steering system, providing precise control over the vehicle. * **Suspension:** Gain insight into the suspension system, critical for handling, ride comfort, and overall vehicle stability. * **Auxiliary Units:** Explore the various auxiliary components and systems, contributing to the overall functionality of the vehicle. * **Electrical:** Understand the electrical system architecture, components, and troubleshooting procedures. * **Wiring Diagrams:** Utilize detailed wiring diagrams to diagnose and repair electrical issues. * **Bodywork:** Explore the construction and components of the vehicle's body, aiding in repairs and modifications. This manual is a valuable resource for individuals seeking to perform maintenance, repair, or restoration on their Lancia Delta HF or HF Integrale Turbo 4WD. It provides a wealth of technical information, enabling you to diagnose and resolve a wide range of issues with confidence.

The Lancia Delta HF Turbo, and its later, more potent evolution, the HF Integrale Turbo 4WD, are iconic rally cars that forever changed the landscape of motorsport. The HF Turbo, launched in 1986, was a homologation special built to comply with Group A rally regulations. It took the Lancia Delta, already known for its elegant design and sharp handling, and imbued it with a potent turbocharged 1.6-liter engine, generating 165 horsepower. The Delta HF Turbo's advanced 4-wheel-drive system, featuring a viscous coupling center differential, ensured maximum traction on loose surfaces. This combination of power and grip made it a formidable competitor in the World Rally Championship, achieving numerous victories in the hands of drivers like Miki Biasion and Juha Kankkunen. The HF Integrale, introduced in 1987, built upon the HF Turbo's winning formula, refining its performance and aesthetics. It featured a wider body, flared wheel arches, and a more potent version of the 1.6-liter turbocharged engine, now producing 185 horsepower in the initial "Evoluzione" model. Subsequent Evoluzione iterations pushed the power output even further, culminating in the 1992 "Evoluzione II" with an impressive 215 horsepower. The HF Integrale Turbo 4WD featured a more sophisticated 4WD system with a mechanical center differential, allowing for precise and responsive handling. This evolution of the Delta HF Turbo became a dominating force in rallying, securing four consecutive World Rally Championship titles from 1987 to 1990. The Lancia Delta HF Integrale remains a symbol of motorsport success and a testament to Italian automotive engineering prowess, recognized as one of the greatest rally cars ever built.