Caterham 420 R £38,000

£38,000.00

Caterham Seven 420R Race Car (CSUK)

(Caterham Seven UK championship spec)

An excellent opportunity to acquire a race proven 420R which finished 3rd in the CSUK championship in 2025. Since, has been fully rebuilt and meticulously maintained over the course of the 2026 season. This car has been fully rebuilt to compete at the front of the grid, an extensive history will demonstrate the commitment and no expense spared mentality that this car has received.

Having not completed a full season due to the owner’s other racing commitments, this car has enjoyed considerably less use than many of its contemporaries, and has a full complement of upgrades attached.

Its most recent outing came at Donington park in 2026, where it delivered an exceptional performance proving its capability with strong finishes across the race weekend, consistently running at the front of one of the UK’s most competitive one-make championships.

Built to current Caterham Seven Championship UK (CSUK) regulations, the car benefits from a brand-new engine fitted at round 3 of the 2026 season. The engine has completed just one race weekend since, offering exceptionally low mileage and an excellent platform for competitive racing.

The car also comes complete with two sets of spare wheels and tyres, and stiffer / softer front anti roll bars for set up adjustment. Included in the sale of the car will be a spare 2.0 Duratec engine which requires a rebuild. This is a fantastic package for anyone looking to go racing immediately.

As one of the UK’s leading Caterham Motorsport teams, Williams Motorsport can continue to prepare, maintain and run this car for its new owner through our comprehensive arrive-and-drive programme. From transportation and race preparation to trackside engineering, driver coaching and ongoing maintenance, we can provide a complete motorsport solution.

Fast, proven and professionally maintained, this Caterham 420R represents an outstanding opportunity to join the front of the Caterham Seven Championship UK grid with a race-winning package.

This is a very competitive and well-maintained car, ideal for someone looking to experience and compete at the top level of Caterham racing.

Specification & Equipment:

- 2019 Caterham 420R (Seven UK Race Car)

- 175hp 2.0 Duratec with Dry-sump

- Sadev sequential 6 speed gearbox

- Full FIA roll cage

- ATL Fuel cell

- Stack dash

- Schroth race harness FIA approved 2029

- Fire extinguisher system FIA approved 04/2028

- Momo suede steering wheel with quick release boss

- Brake bias lever

- Race Sense throttle position and brake pressure monitoring

- Slick tyres

- Wet tyres

- 2 spare sets of wheels

- Additional anti roll bars

- Spare engine (requires rebuild)

Recent works;

- Replacement engine - July 2026 (one outing since being replaced)

- New chassis loom - May 2026

- New engine loom - May 2026

- All new sub looms - May 2026

- New clutch and flywheel – May 2026

- New rad / Oil cooler – May 2026

- New fuel pump - July 2026

- Gearbox refreshed by SWR Motorsport – July 2026

- Full fluids replaced before last outing

Full list of works available upon request

Note – Car doesn’t come with the below items but can be purchased and fitted if required;

-          Vbox HD2 – Can be purchased through Williams Motorsport

-          Transponder – Can be purchased through Williams Motorsport

-          Driver seat – Custom bead seat fitting can be arranged through Williams Motorsport