From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Production status of the 20/25 HP model, its replacement, and modifications for a specific variant.
| Identifier | ExFiles\Box 3\4\ 04-page011 | |
| Date | 16th March 1931 guessed | |
| Contd:-2- By the time this car was being produced the 20/25 H.P. would have gone out of production, and have been replaced by J.III, therefore, there would be no duplication of engine sizes between RR. models and Bentley. The attached sheet giving main particulars of the various chassis under consideration will be useful in considering the situation. Item No.4 (Japan I) is the same as the standard 20/25, but is altered in the head and other details so as to give better performance. | ||