1974 Jensen

1974 Jensen Interceptor MkIII Convertible | Rare UK Car | EFI | £45k+ Upgrades

Interceptor MkIII Convertibles are already a rare proposition — but UK-supplied cars even more so, with just 86 delivered to the home market.

Finding one that’s not only genuine, but properly developed and usable by modern standards, is where the search becomes difficult.

This example sits firmly in that upper tier. Rather than remaining a standard, carburetted car with typical compromises, it has benefitted from over £45,000 of engineering-led upgrades — transforming it into a far more resolved and usable GT.

Why the MkIII Convertible Matters

- One of just 86 UK-supplied MkIII Convertibles

- Final evolution of the Interceptor Convertible

- Hand-built British GT with Italian styling and American V8

- Increasingly recognised as a usable, long-distance classic

This Example

- UK-supplied MkIII Convertible (1 of 86)

- Matching numbers, well-specified car

- Over £45,000 of upgrades and development

- Electronic Fuel Injection conversion (2022)

- Bespoke performance exhaust with upgraded manifolds

- Cooling, braking and electrical systems comprehensively reworked

- Developed for usability rather than preservation

Condition & Development

What separates this car is not just its rarity, but how it drives.

This is not a car that has simply been maintained — it has been systematically developed. Key systems have been re-engineered to remove the typical weaknesses of a standard Interceptor, resulting in a car that starts cleanly, runs consistently, and can be used with confidence.

The character remains — but without the frustration.

Position in the Market

Most Interceptor Convertibles fall into one of two categories: original but compromised, or restored but still lacking real usability.

Very few have had this level of considered, system-led development.

With the cost of properly upgrading a car now well understood, examples like this — where that investment has already been made — are becoming increasingly relevant.

Next Steps

To request a full walkaround video, additional images, and any further detail regarding the history file, please contact us directly. We are also happy to discuss the car or arranging a viewing.