Carburettors vs Fuel Injection | Which Should Power Your E-Type?

Few topics divide classic Jaguar E-Type enthusiasts quite like the question of fuelling. On one side, you have the unmistakable charm of the original triple SU carburettors – a setup that has powered these icons since the early 1960s. On the other, there’s the precision and reliability of a modern electronic fuel injection (EFI) system.

Both approaches have their loyal fans, and both offer unique benefits. So which is right for your E-Type?

CARBURETTORS – KEEPING IT ORIGINAL

The triple SU carburettor arrangement is an integral part of the E-Type’s character.

- Authenticity: Carburettors preserve the car’s original specification, something highly valued by collectors and concours judges.
- Aesthetics: Few things look more “right” in an E-Type engine bay than polished SU dashpots and linkages.
-Mechanical Romance: There’s a tactile satisfaction in balancing and tuning carburettors – it’s a skill as old as motoring itself.

However, carburettors require regular adjustment, can be temperamental in cold weather, and their performance can vary with altitude and temperature.

 FUEL INJECTION – MODERN RELIABILITY

Upgrading to a discreet EFI system transforms how an E-Type behaves on the road.

- Cold-Start Ease: EFI systems deliver instant, consistent starts in all conditions.
- Fuel Efficiency: More precise fuel delivery can mean fewer trips to the pump.
- Smoother Running: Throttle response is sharper, and engine performance more consistent.
- Reduced Maintenance: Once installed, EFI generally requires far less hands-on attention than carburettors.

Of course, purists argue that EFI takes away some of the charm – and fitting it may impact a car’s value if originality is a priority.

IS THERE A MIDDLE GROUND?

Some owners opt for an EFI system designed to mimic the appearance of SU carburettors, combining the classic look with modern function. This “best of both worlds” approach is becoming increasingly popular, especially for those who enjoy long-distance touring or use their E-Type regularly.

Expert Support, at E-Type UK, we offer specialist services for both original carburettor rebuilds and discreet EFI conversions, ensuring your classic runs exactly the way you want it to. Whether you’re chasing concours authenticity or modern touring reliability, our expert team can help tailor the perfect fuelling solution for your E-Type.