1968 Jaguar 420 - AJ6 EFI & Manual Conversion

Highlights

• Considerably upgraded with a 4.0-litre AJ6 engine and five-speed manual gearbox
• Power steering and ABS fitted
• Electrically adjustable seats
• LPG system added
• Previously in single ownership for over 10 years
• Vendor reports it drives well with modern drivability

The Appeal

By the mid 1980s, Jaguar's excellent XK engine was getting rather long in the tooth. A new straight-six was needed; initially conceived as a four-valve conversion of the old XK block, it evolved into an entirely new design sharing bore spacing with the Jaguar V12. Designed to meet stringent emissions and modern efficiency standards, the 430-lb AJ6 engine featured an aluminium block, dual overhead cams, and four valves per cylinder. It proved to be an excellent powerplant.
That brings us on to this Jaguar 420. The model was produced for just two years between 1966 and 1968, and represented the top of Jaguar's compact saloon range, pairing the refined lines of the S-Type with the four-headlamp front end of the Mark X. Fewer than 10,000 were built, and survivors are an increasingly uncommon sight.

Our car has been significantly upgraded with mechanical and interior components believed to be sourced from a Jaguar XJS, including an AJ6 4.0-litre electronically fuel-injected engine, ABS braking, power steering, and XJS interior trim. An LPG conversion has also been fitted for dual-fuel capability. The vendor has driven the car and reports that it drives like a modern vehicle.
There is, of course, some scope to improve the car's presentation, or else enjoy it in this richly patinated state.

Key Information

• Mileage: 20,840 miles (indicated, replacement aftermarket odometer)
• Country of registration: United Kingdom
• Technical inspection status: MOT/road tax exempt
• Technical specs: 4.0-litre AJ6 six-cylinder petrol with electronic fuel injection, five-speed manual, LPG dual-fuel system
• Paperwork: supplied with V5C only; vendor confirms no service records or additional documentation accompany the car
• Notice to bidders: DVLA data still records 4.2-litre engine

The Detail

• Fitted with an AJ6 4.0-litre electronically fuel-injected engine, believed to be from a Jaguar XJS
• LPG conversion fitted for dual-fuel capability
• ABS and power steering fitted
• Interior upgraded with Jaguar XJS trim
• Six former registered keepers, with the previous keeper having owned the car for over 10 years
• No service history or additional documentation is available beyond the log book
• Some signs of age/deterioration to the body shell which can be studied in the photographs

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