Rolls-Royce 25/30

The Rolls-Royce 25/30 built between 1936 and 1938 is an updated version of the 20/25 with larger engine to provide more power, as often, over-large bodies had been fitted to the earlier model leading to complaints about its performance.[2]

Rolls-Royce 25/30
Overview
ManufacturerRolls-Royce Ltd
Production1936–1938
1201 made[1]
Powertrain
Engine4257 cc
Transmission4-speed manual
Dimensions
Wheelbase132 inches (3.4 m)[1]
Chronology
Predecessor20/25
SuccessorWraith

Engineering

The in-line 6-cylinder, overhead-valve 25/30 hp engine is similar to that used in the 20/25 but increased in capacity to 4,257 cc (259.8 cu in) by increasing the bore from 3.25 inches (8.3 cm) to 3.5 inches (8.9 cm), with the stroke remaining at 4.5 inches (114.3 mm). The compression ratio is 6:1. A single proprietary Stromberg downdraught carburettor replaced the Rolls-Royce one, and magneto ignition was no longer fitted, but a standby coil was provided.[1] The four-speed gearbox is mounted in unit with the engine, and a traditional right-hand change used. Synchromesh is fitted to third and top gears.

The riveted chassis has rigid front and rear axles suspended by half-elliptic springs with hydraulic dampers. Braking is on all four wheels assisted by a mechanical servo, famously under licence of Hispano-Suiza. Separate rear brakes are fitted for the handbrake. The traditional Rolls-Royce radiator with triangular top was used with vertical louvres, the opening angle of which is controlled thermostatically to control engine cooling.

Bodywork

Only the chassis and mechanical parts were made by Rolls-Royce. The body was made and fitted by a coachbuilder selected by the owner. Some of the most famous coachbuilders who produced bodies for Rolls Royce cars are Park Ward, Thrupp & Maberly, H. J. Mulliner & Co., Arthur Mulliner and Hooper.

Movie appearances

This Rolls Royce appears in films such as The Naked Truth (1957), Death on the Nile (1978), and several others. Although the sultan in Indiana Jones and the Last Crusade (1989) calls his car a Phantom II, the technical details he recites are those of the 25/30. However, the actual on-screen car was neither; it was a 1935 20/25.[3]

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See also
  •  Cars portal

References
  1. The Rolls-Royce Motor Car. Anthony Bird and Ian Hallows. Batsford Books. 2002 ISBN 0-7134-8749-6
  2. Sedgwick, M. (1989). A-Z of Cars of the 1930s. Devon, UK: Bay View Books. ISBN 1-870979-38-9.
  3. Internet Movie Cars Database: Rolls-Royce 25/30 in Movies and TV series
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