About the Bentley Series I
The Bentley S1 marked a significant departure from previous models, featuring a modern steel monocoque body and a 4.9-litre straight-six engine producing 178 bhp. Built at Crewe alongside the Rolls-Royce Silver Cloud I, the S1 shared its mechanical underpinnings but maintained Bentley's sporting character with a more aggressive radiator grille and performance-oriented image.
Standard Steel saloons comprised the majority of production, though coachbuilt variants from firms like H.J. Mulliner, Park Ward and James Young command premium prices today. The automatic transmission was standard, providing effortless cruising befitting Bentley's grand touring ethos. Around 3,107 examples were built during its four-year production run.
What Affects the Price of a Used Bentley Series I
Condition is paramount when valuing a Series I. Restored examples with documented work history fetch top prices, whilst cars requiring extensive restoration may sell for under £50,000. Originality matters greatly to collectors, with matching-numbers cars and original coachwork commanding premiums over modified or re-bodied examples.
Coachbuilt models typically sell for £100,000 to £150,000 or more, depending on the coachbuilder and body style. Standard Steel saloons generally range from £45,000 to £85,000. Provenance, including ownership history and period documentation, can add significant value. Mileage is less critical than condition, though extremely high-mileage cars may require more mechanical attention.
Buying Tips for a Bentley Series I
Inspect the body thoroughly for corrosion, particularly in sills, floor pans and around the rear suspension mounting points. The steel bodywork is susceptible to rust if not properly maintained. Check all electrical systems, as period Lucas components can be problematic and expensive to rectify.
Examine the engine for oil leaks and listen for unusual noises from the valve train. Rebuilds are costly, so compression testing is advisable. The automatic gearbox should shift smoothly without hesitation. Verify all chassis numbers match and request full service history. Budget for ongoing maintenance costs, as running a Series I requires specialist knowledge and parts can be expensive.