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).
The suitability of Bentley models for Ethyl petrol.
| Identifier | ExFiles\Box 150\1\ scan0133 | |
| Date | 3rd July 1936 | |
| W/S - C. X1282 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}6/KW.3.7.36. Re Ethyl petrol. Replying to C15/C.2.7.36. The Bentley was made suitable for Ethyl petrol prior to the introduction of the 4¼ litre. Austenitic exhaust valves, which are a protection against Ethyl, were fitted to the 3½ litre from the beginning: these cars can therefore be run on Ethyl. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||