Background
Following the takeover of Bentley by Rolls-Royce, the Bentley Derby was the first model to be produced at the Rolls-Royce Derby factory in 1933. The 3.5 Litre Bentley was the first of the 1933-1940 era, collectively known as Derby ('Darby') Bentleys. The 3.5 Litre emerged from Rolls-Royce’s ‘Peregrine’ project, intended to create a fine motorcar on a smaller scale suitable for the increasingly difficult Great Depression. That project ultimately produced two motorcars: the Rolls-Royce 20/25 and the Bentley 3.5 Litre. Development of the Bentley 3.5 Litre was completed under the ongoing direction of W.O. Bentley, resulting in the creation of two very different motorcars, much to the delight of Bentley enthusiasts. After all, there is a reason why the counterpart to the Rolls-Royce Owners Club is the Bentley Drivers Club!
The Bentley 3.5 Litre became known as ‘The Silent Sports Car’, featuring a cross-flow cylinder head design with twin S.U. carburettors and twin fuel pumps that produced 105 horsepower, which, when fed through a four-speed synchromesh transmission, was good for 90 mph. The Bentley 3.5 Litre was well received by an adoring public for its masterful blend of luxury and performance. W.O. Bentley is said to have called this the best motorcar ever to carry his name at the time. Displacement was enlarged to 4.25 litres in 1936, raising output to 126 horsepower and the top speed to nearly 100 mph, increasing performance and enhancing the ability to carry a wide range of coachworks.
Chassis and engines built in Derby were delivered exclusively to coachbuilders who designed and constructed bodies to buyers’ individual specifications. Given this level of exclusivity, only 1,234 Bentley 4.25 Litres were produced between 1936 and 1940, with a small number of them offered as a Pillarless saloon and bodied by Park Ward.








