Rolls-Royce 25/30

Rolls-Royce 25/30
Overview
Manufacturer Rolls-Royce Ltd
Production 1936-1938
1201 made[1]
Powertrain
Engine 4257 cc
Transmission 4-speed manual
Dimensions
Wheelbase 132 inches (3.4 m)[1]
Chronology
Predecessor 20/25
Successor Wraith

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]

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.[3]

See also

References

  1. 1 2 3 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
Rolls-Royce Motor Cars timeline
Type 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s
Ownership Independent Vickers plc VW Group BMW
Luxury car 10 hp
15 hp		 V-8
20 hp		 Twenty 20/25 25/30 Wraith WWII Silver Dawn Silver Cloud Silver Shadow Silver Spirit/Dawn Silver Seraph Ghost
Ultra-luxury car 30 hp 40/50 hp (Silver Ghost) Phantom I/II/III Silver Wraith Silver Wraith II Silver Spur Ghost Extended Wheelbase
Phantom IV Phantom V/VI Touring Limousine Park Ward Phantom
Convertible Corniche/II/III/IV Corniche V Phantom Drophead
Coupé Camargue Silver Spirit Hooper 2 Door Phantom Coupé
Wraith
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