This manual covers the Porsche 928, encompassing the S, S4, GT, and GTS models produced between 1978 and 1994. The Porsche 928 is renowned for its innovative engineering, combining the performance of a sports car with the practicality of a grand tourer. Its distinctive front-engine, rear-wheel-drive layout and advanced technology set it apart in its class, offering a unique blend of luxury, comfort, and dynamic driving capabilities.

The purpose of this comprehensive service manual is to provide detailed guidance for the maintenance and repair of your Porsche 928. It includes essential information on routine servicing, diagnostic procedures, troubleshooting common issues, and in-depth technical specifications. By following the instructions within this manual, owners and technicians can ensure the optimal performance, reliability, and longevity of the vehicle.