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).
Stating a lower geared axle or higher compression cannot be recommended for the 20 HP model.
| Identifier | ExFiles\Box 102\4\ scan0024 | |
| Date | 1st April 1928 | |
| X5445 X5350 X5440 (Struck Through) X5770 To C. from Hs.{Lord Ernest Hives - Chair} Hs{Lord Ernest Hives - Chair}2/LG2. 4. 28. With reference to C6/C28.3.28. At the moment we cannot recommend giving a lower geared axle or higher compression for the 20 HP. Hs.{Lord Ernest Hives - Chair} | ||