Bentley 3 ½ litre Derby Bentley

Bentley 3 ½ litre Derby Bentley

Bentley 3 ½ litre Derby Bentley 1933-1935 parts and spares

Production: 1933–1939, 2411 produced | Engines: 3.7 L I6, 4.25 L I6 | Wheelbase: 126 in (3,200 mm)

Bentley 3 1/2 LtrThe 3½ Litre (and later 4¼ Litre) was presented to the public in September 1933, shortly after the death of Henry Royce, and was the first new Bentley model following Rolls-Royce's acquisition of the Bentley brand in 1931. This era of Bentley models are also known as "Derby Bentleys" because they were built in the Rolls-Royce factory located in Derby, England.

Based on an experimental Rolls-Royce project "Peregrine" which was to have had a supercharged 2¾ L engine, the 3½ Litre was finally fitted with a less adventurous engine developed from Rolls' straight-6 fitted to the Rolls-Royce 20/25. The Bentley variant featured a higher compression ratio, sportier camshaft profile and two SU carburettors on a crossflow cylinder head. Actual power output was roughly 110 bhp (82 kW) at 4500 rpm, allowing the car to reach 90 mph (145 km/h). The engine displaced 3.7 L (3669 cc/223 in³) with a 3¼ in (82.5 mm) bore and 4½ in (114.3 mm) stroke.

A 4-speed manual transmission with synchromesh on 3rd and 4th, 4-wheel leaf spring suspension, and 4-wheel servo-assisted mechanical brakes were all common with other Rolls-Royce models. The chassis was manufactured from nickel steel, and featured a "double-dropped" layout to gain vertical space for the axles and thus keep the cars' profile low. The strong chassis needed no diagonal cross-bracing, and was very light in comparison to the chassis built by its contemporary competitors, weighing in at 2,510 pounds (1,140 kg) in driveable form ready for delivery to the customer's chosen coachbuilder.

1177 3½ Litre cars were built, with about half of them being bodied by Park Ward, with the remainder "dressed" by other well known coachbuilders like Barker, Freestone & Webb, Gurney Nutting, Hooper, Mann Egerton, Mulliner (both A and HJ), Rippon, Thrupp & Maberly, James Young, Vanden Plas and Windovers in England; Figoni, Kellner, Saoutchik and Vanvooren in Paris; and smaller concerns elsewhere in UK and Europe.

 

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