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).
Vehicle's performance using different fuels and axle ratios during a trip in Europe.
| Identifier | ExFiles\Box 89\2\ scan0147 | |
| Date | 3rd January 1936 | |
| -2- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/KW.3.1.36. commercial stuff that must have been somewhere about 60 octane. On this the car was thoroughly unpleasant. Generally speaking, until I got to Austria and Hungary, I found I could use Esso all the way. DTD-224 of course gives 100% results. I found that with the standard axle ratio on fast Continental roads like Vienna to Budapest I got maximum speed without over-revving with this head. Best wishes for 1936. Yours sincerely, | ||