The Porsche 928, produced from 1977 to 1995, represented a significant evolution in the marque's lineup, offering a front-engine, rear-wheel-drive grand tourer with a focus on comfort, performance, and advanced engineering. This model, recognized as European Car of the Year in 1978, featured innovative technologies for its time, including a transaxle for optimal weight distribution and independent rear suspension. Throughout its production, the 928 evolved with various V8 engine displacements, from the initial 4.5-liter to the later 5.4-liter found in the GTS, delivering a performance range from 219 to 350 horsepower. Its design philosophy and engineering quality positioned it as a competitor to other luxury GTs, influencing the broader automotive landscape.

This comprehensive factory-authorized service and repair manual provides in-depth guidance for all Porsche 928 models manufactured between 1977 and 1995. It covers all essential systems, including the powertrain, drivetrain, chassis, and electrical systems, detailing everything from scheduled maintenance and fluid services to complex engine rebuilds and transmission overhauls. The manual includes troubleshooting guides, diagnostic procedures, and detailed technical specifications such as torque values and clearances. Its purpose is to equip owners, mechanics, and technicians with the necessary information to maintain, diagnose, and repair the Porsche 928 effectively, ensuring its continued performance and longevity.