The company was always underfunded and Bentley turned to millionaire Woolf Barnato for help in 1925. As part of a re-financing deal, leaving him effectively owning the company, Barnato became chairman. A great deal of Barnato's fortune was devoted to keeping Bentley afloat but the Great Depression destroyed demand for the company's expensive products, and it was finally sold to Rolls-Royce in 1931.
The Bentley Boys
A group of wealthy British motorists known as the "Bentley Boys" (Woolf Barnato, Sir Henry Birkin, steeplechaser George Duller, aviator Glen Kidston, automotive journalist S. C. H. "Sammy" Davis, and Dr. Dudley Benjafield among them) kept the marque's reputation for high performance alive. Thanks to the dedication of this group to serious racing, the company, located at Cricklewood, north London, was noted for its four consecutive victories at the 24 hours of Le Mans from 1927 to 1930. Their greatest competitor at the time, Bugatti, whose lightweight, elegant, but fragile creations contrasted with the Bentley's rugged reliability and durability, referred to them as "the world's fastest lorries". In March 1930, during the Blue Train Races, Woolf Barnato raised the stakes on Rover and its Rover Light Six having raced and beat Le Train Bleu for the first time, to better that record with his 6½ Litre Bentley Speed Six on a bet of 100 Pound Sterling. He drove against the train from Cannes to Calais, then by ferry to Dover and finally London, travelling on public highways, and won; the H. J. Mulliner-bodied formal saloon he drove during the race as well as a streamlined fastback "Sportsman Coupe" by Gurney Nutting he took delivery of on 21 May 1930 became known as the Blue Train Bentleys; the latter is regularly mistaken for or erroneously referred to as being the car that raced the Blue Train, while in fact Barnato named it in memory of his race .
The original model was the 3 litre, but as customers put heavier bodies on the chassis a larger 4½ litre model followed. Perhaps the most iconic model of the period is the 4½ Litre "Blower Bentley", with its distinctive supercharger projecting forward from the bottom of the grille. Uncharacteristically fragile for a Bentley, it was not the racing workhorse, the 6½ Litre was. It became famous in popular media as the vehicle of James Bond in the original novels, but not in film; however John Steed in the television series The Avengers did drive a Bentley.