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).
Report comparing petrol consumption figures for the Phantom III model with different carburetter and overdrive settings.
| Identifier | ExFiles\Box 147\5\ scan0145 | |
| Date | 17th November 1937 | |
| Sg.{Arthur F. Sidgreaves - MD} from Rm.{William Robotham - Chief Engineer} Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} Cx.{Major Len W. Cox - Advertising Manager} 1249 P.III PETROL CONSUMPTION. Sometime ago we pointed out that we were working to improve the P.III petrol consumption. The following figures which are obtained from average results show the progress that has been made:- Average Speed. Consumption. Present standard P.III. 45 m.p.h. 11 m.p.g. Present standard P.III with new carburetter setting ............ " 11 1/2 " Present standard P.III with new carburetter setting & overdrive... " 13 1/2 " The figures on the 15,000 miles test are some- what misleading from a consumption point of view. Rm.{William Robotham - Chief Engineer} | ||