Bentley S1

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Bentley S1

Manufacturer	Bentley
Also called	Bentley S1 Continental
Production	1955–1959 3538 produced
Predecessor	Bentley R Type
Successor	Bentley S2
Engine	4.9 L I6
Transmission	4-speed automatic 4-speed manual
Wheelbase	3124.2 mm (123 in) 3225.8 mm (127 in)
Related	Rolls-Royce Silver Cloud

The Bentley S1 was a luxury car produced by Bentley Motors Limited from 1955 through 1959. It marked Bentley parent, Rolls-Royce, reducing the differences between their Bentley and Roll-Royce models, with the S1 differing only in its radiator design and badging from the Rolls-Royce Silver Cloud I.

The models shared the 4.9 L (4887 cc/298 in³) straight-6 engine, with this being the last vehicle to use descendants of the engine originally used in the Rolls-Royce Twenty from 1922 to 1929. The bore was 95.25 mm (3.7 in) and the stroke was 114.3 mm (4.5 in). Twin SU carburetors were fitted, with upgraded models from 1957. A 4-speed automatic transmission was standard, with a 4-speed manual available as an option until 1957. Two wheelbases were produced: 123 in (3124 mm) and, from 1957, 127 in (3226 mm).

A somewhat sportier coachbuilt-only S1 Continental was introduced six months later.