The Bentley S or S1 as it later became, was produced from 1955 until 1959. Derived from Rolls-Royce's Silver Cloud, the new standard steel saloon was a complete redesign from the previous R type standard steel saloon which had been in production, with modifications, since 1946. It was larger than the R Type, the body was manufactured in pressed steel with stressed skin construction. Doors, bonnet and luggage locker lid were of aluminium. Having a totally new external appearance, although with the traditional radiator grille. As with the preceding models there was no difference between Bentley and Rolls-Royce, the Bentley S differing only in its radiator grille shape and badging from the Rolls-Royce Silver Cloud l. Both variants were the last standard production models with an independent chassis. The models shared the 4.9 L (4887 cc/298 in³) straight six engine. They were the last vehicles to be powered by descendants of the engine originally used in the Rolls-Royce Twenty, from 1922 to 1929. In all, 3,072 standard versions were produced with a wheelbase of 123 inches (3,100 mm), (145 with coachbuilt bodies). And from 1957, a further 35 long wheelbase versions were produced, with 127 inches (3,200 mm), (12 with coachbuilt bodies).
When tested by The Motor magazine 1957, the standard model had a top speed of 103 mph (166 km/h) and could accelerate from 0–60 mph (0–97 km/h) in 13.1 seconds. A fuel consumption of 16.1 miles per imperial gallon (17.5 L/100 km; 13.4 mpg‑US) was recorded. The test car, which had the optional power steering, cost £6305 including taxes of £1803.