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 anticipated petrol consumption for the Phantom III model.
| Identifier | ExFiles\Box 27a\1\ Scan399 | |
| Date | 6th April 1936 | |
| x1265 W/P - Sr. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}8/KW.6.4.36. Re Phantom III Petrol Consumption. Replying to Sr./Dn.9/MLG.31.3.36. We anticipate that the Ph.III will do between 8 and 9 m.p.g. when driven at average speeds of 40 m.p.h. and over under English conditions. It may be less on flat out "blinds" on the Continent, unless a higher axle ratio is fitted for these conditions. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||