The Jaguar 420, produced between 1966 and 1968, is a distinguished luxury saloon that embodies Jaguar's heritage of performance and refinement. Visually distinct with its elegant 'Sovereign' styling, featuring a more formal grille and quad headlights compared to its XJ6 platform-mate, the 420 was engineered for senior executives and discerning drivers. It offers a compelling blend of Jaguar's renowned performance, powered by a 4.2-liter DOHC Inline 6-cylinder XK engine, with enhanced luxury and comfort. This model represents a significant offering in the executive car segment of its era, balancing classic British style with capable engineering.

This comprehensive Service Repair Manual and Parts Catalogue provides detailed information for the Jaguar 420. It covers all essential systems, including the powertrain, transmission, chassis, electrical components, and bodywork. Owners and technicians will find in-depth procedures for routine maintenance, engine and transmission overhauls, brake system repairs, and electrical troubleshooting. The manual also includes an illustrated parts breakdown with part numbers, technical specifications, and fluid recommendations. Its scope ranges from basic upkeep to complete rebuilds, ensuring the longevity and optimal performance of this classic Jaguar.