Bentley · 1955
S1
Automatic · RWD · United Kingdom
AutoIndex value · good UK car
£25,000
Half of the 8 sales The Classic Valuer recorded in the last 12 months were between £6,000 and £80,000.
Checked against recent sales on 4 November 2026. How we value cars
Estimated price by condition
Project
£15,000
Restoration candidate
Driver
£25,000
Good usable example
Concours
£37,500
Show standard
Indicative condition bands · not a valuation of a particular car
Price check
Looking at a S1 for sale? Is it a good price?
Buyer’s notes
About the Bentley S1
The S1 of 1955 to 1959 was the Bentley version of the Rolls-Royce Silver Cloud I and, in standard form, identical to it in most respects apart from the radiator grille. Most carry the standard steel saloon body by Pressed Steel, with aluminium doors, bonnet and boot lid, on a separate chassis. A 4.9-litre six drives through a four-speed automatic gearbox.
What moves the price
- Structure: with so much steel in the body, rust repair can quickly cost more than the car is worth.
- Coachwork: the standard Pressed Steel saloon is the common car; long-wheelbase cars are far rarer.
- Steering: earlier cars have unassisted steering, which is heavy at low speed.
Before you buy, check
- The chassis below the battery, which sits on the right rear chassis leg, and the body-mounting outriggers.
- Sills and inner sills, wing and door bottoms, the boot floor and the body-to-chassis mounts.
- Front suspension wear and sagging rear springs; on the road test, note that the gearbox-driven brake servo only assists once the car is moving.
Facts checked against: Wikipedia · conceptcarz.com · classiccars.brightwells.com · classicsworld.co.uk · hagerty.co.uk · motorsportmagazine.com
Vehicle data
Specifications
From 1955
Performance
Production
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Bentley S1: value questions answered
- How much is a Bentley S1 worth?
- A good, usable UK example of the Bentley S1 is worth around £25,000 on the AutoIndex index. A project car that needs restoration is nearer £15,000, and a concours-quality example around £37,500. Condition moves the price more than anything else.
- What makes one S1 worth more than another?
- Service history and paperwork — complete, stamped, explained
- Mileage against the norm for the model
- Originality — matching numbers, original paint and trim
- Specification — gearbox, colour, factory options
- UK-supplied versus imported
- Is the S1 I'm looking at fairly priced?
- Enter its asking price and condition in the price check above. It compares the price with the index for that condition and tells you what to ask the seller about.
- How many S1 cars were built?
- Around 3,072 were built, by our production records.
Embed this valueFor club pages, forum posts and listings: a live value card that links back here.+
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