During the late 1920s and early 1930s Bentley ran into grave financial trouble and by 1931 Rolls-Royce had stepped in and bought the assets and goodwill of the defunct company and formed a new one, Bentley Motors (1931) Ltd. Rolls-Royce had considered the Bentley marque to be a growing threat to their future success, but following their purchase decided to continue the Bentley name, albeit under their own stewardship, taking the company in an entirely new direction with the creation of the Silent Sports Car or Derby Bentley. In 1933 the new Bentley 3.5 Litre model was released and was an instant success. The combination of effortless power and style met with almost universal praise. It was powered by a developed twin carburettor version of Rolls-Royces own 20/25 model and was installed in a low 126 inch wheelbase chassis that basically remained unaltered until the cessation of production in 1939 due to the outbreak of hostilities. Synchromesh was present on third and fourth gears and the Derbys were fitted with a cross flow cylinder head and superb servo assisted brakes, encapsulating all of the perfection of Rolls-Royce engineering in this small sporting Bentley. Fitting of individual coachwork by approved body builders continued in true Rolls-Royce fashion giving potential buyers a great deal of choice in the look of their new motorcar. 1936 saw further improvements with the introduction of the 4.25 Litre model when production of the 3.5 Litre unit ceased.