The new 20/25 model was debuted at the 1929 Olympia Motor Show and proved to be tremendously popular becoming the greatest of the inter-war successes. There were 3827 20/25 hp produced – over twice the number of its contemporary sibling the Phantom II. The popularity of the 20/25 saved Rolls-Royce Limited during the pre-war economically difficult years. Ultimately 20/25 model was replaced by the 25/30 model in 1936 in which the bore was further increased to 3.5 inches. In 1938 the 25/30 was given a new chassis with independent front suspension and was renamed the Wraith.