The Jaguar 420, produced between 1967 and 1968, represents a significant model in the marque's history, serving as a bridge between the classic Jaguar saloons and the revolutionary XJ6. This luxury saloon, based on the XJ6 Series 1 platform and internally coded XJ4, combined Jaguar's renowned XK inline-six engine with a more compact and refined body style. It offered a compelling blend of performance and executive comfort, positioning itself against contemporaries like the Rover P5B and Daimler 250. The 420's engineering excellence is evident in its powerful 4.2-liter engine, independent suspension, and four-wheel disc braking system, all contributing to its reputation for smooth ride quality and capable handling.

This comprehensive workshop service repair manual and parts catalog provides essential information for the maintenance, repair, and restoration of the Jaguar 420. Covering all variants, the manual details the powertrain, chassis, and electrical systems, including the XK engine, automatic and manual transmissions, suspension, steering, and braking systems. It also details body and interior components, offering extensive guidance on maintenance procedures, common issues, and repair techniques. With approximately 400-600 pages of high-resolution, searchable content in English, this manual is an indispensable resource for owners, mechanics, and technicians aiming to preserve the integrity and performance of this classic Jaguar.