Caterham’s 2026 UK price list puts the Seven 420S at £41,990 as a complete kit. If you want the 420R pack instead, it’s £42,990. Factory build adds £2,595, so a factory-built 420S comes to £44,585, which is the on-the-road figure Caterham uses in its finance example. You get 210 bhp from a dry-sumped 2.0-litre Ford Duratec in a car that weighs about 560 kg. The only gearbox listed is a five-speed manual.
The clutch: a five-speed manual, and nothing else
Caterham’s Seven 420 page lists the transmission as a “5-speed manual gearbox” in the spec table, in the Standard equipment pack, and again in the optional pack. You won’t find an automatic, a paddle-shift, or a dual-clutch on the 420 at all. The only factory sequential on the price list is a six-speed, and Caterham marks it for the supercharged 620R alone. On the 420, the upgrades sharpen the manual car rather than replace it. The optional equipment pack adds a lightweight flywheel and a limited-slip differential, the S Range list prices the diff at £1,500, and £600 sequential shift lights tell you when to grab the next gear. The gearbox sits behind a naturally aspirated Duratec that makes 210 bhp at 7,600 rpm and 203 Nm at 6,300 rpm, so you’ll be using the lever a lot.
The official numbers
From Caterham’s Seven 420 page and the 2026 UK S Range and R Range price lists (V2.1):
- Seven 420S complete kit: £41,990
- Seven 420R complete kit: £42,990
- Factory build: £2,595 (£44,585 on the road for a factory-built 420S, per Caterham’s finance example)
- Limited-slip differential (S Range): £1,500
- Large chassis: £2,750
- Engine: Ford Duratec 1,999 cc four-cylinder, naturally aspirated, dry sump as standard
- Power: 210 bhp at 7,600 rpm
- Torque: 203 Nm at 6,300 rpm
- Transmission: five-speed manual
- Weight: 560 kg (specification dependent), 375 bhp per tonne
- 0–60 mph: 3.8 seconds
- Top speed: 136 mph
- Dimensions: 3,180 mm long, 1,470 mm wide, 1,090 mm high
- Steering: rack and pinion, 1.93 turns lock to lock
Where the 420 fits
The 420 sits between the 180 bhp 360 and the 310 bhp supercharged 620. A 420S kit costs £3,500 more than a 360S, and for that you get another 30 bhp, dry sump lubrication as standard, and a 0–60 time of 3.8 seconds instead of 4.8. It’s also the cheapest Seven that matches the 420 Nürburgring Edition’s 3.8-second time without that car’s £48,995 limited-run price. The 620S is £58,490 and comes factory built only, and the 620R, at £66,490, is the one that swaps to the six-speed sequential. If you want a Caterham with a clutch pedal and the most power on offer, the 420 is the top of the range.
More Caterham and lightweight-manual reading
This is the fourth Caterham we’ve covered from the 2026 price lists. Read Caterham Priced the 2026 Seven 360S at £38,490 and Kept Only the Clutch, Caterham Priced the 2026 Seven 170S at £29,490 and Kept Only the Clutch, and Caterham Priced the 2026 Seven 420 Nürburgring Edition at £48,995 and Kept Only the Clutch. If you’d rather have a roof and a heater that’s on all the time, there’s also the 2026 MX-5 Sport at $30,430.
£41,990, 210 bhp, about 560 kg, and five forward gears you change yourself. That’s the Seven 420S on Caterham’s 2026 list.
Highlights
- Seven 420S complete kit £41,990; 420R £42,990; factory build adds £2,595
- 2.0 Duratec, 210 bhp at 7,600 rpm, dry sump as standard
- Five-speed manual is the only gearbox; the six-speed sequential is reserved for the 620R
- 0–60 mph in 3.8 seconds, 136 mph, about 560 kg
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