1931 Rolls-Royce 20/25 Drophead Coupe (by Worblaufen)
Rolls-Royce’s most successful interwar (period between WWI and WWII) model emerged from the company’s “Goshawk” development project in 1929, replacing the 20 HP as the marque’s entry-level offering. The 20/25 became extremely popular and was the best-selling interwar Rolls-Royce, helping the company survive the Great Depression
The distinctive triangular-topped radiator featured adjustable vertical shutters that controlled engine cooling. These were initially operated manually but became thermostat-controlled starting in 1931.
Built between 1929 and 1936, a total of 3,827 20/25s were produced, and it is believed that more than 70% of these survive today.
Power came from a 3.7-liter (3,675cc) inline six-cylinder engine with overhead valves, producing approximately 65 horsepower. This represented a 17% increase in displacement over its predecessor, the 20 HP, which had a 3,128cc engine, and raised the RAC rating to 25.4 hp.
The four-speed transmission gained synchromesh on third and top gears from 1932, while four-wheel servo-assisted drum brakes provided stopping power.
Rolls-Royce sold only the rolling chassis, with coachwork completed by specialist firms such as Park Ward, Worblaufen, Mulliner, and Hooper according to customer preferences.
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