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).
File card regarding Bentley V. rear axle ratios.
| Identifier | ExFiles\Box 98\1\ scan0054 | |
| Date | 5th May 1939 | |
| 400c. Rm.{William Robotham - Chief Engineer} By.5/G.5.5.39. Bentley V.{VIENNA} Rear Axle Ratios file 402. | ||