Comparative fuel consumption tests between car models 19-EX and 25-EX.
| Identifier | ExFiles\Box 13\4\ 04-page024 | |
| Date | 16th August 1932 | |
| 87080. To Hs. {Lord Ernest Hives - Chair} from GWH. {George W. Hancock - Head Chateauroux} Hs {Lord Ernest Hives - Chair} /GWH. {George W. Hancock - Head Chateauroux} 3/KT.16.8.32. Comparative consumption tests taken with 19-EX, semo-expanding carburetter, 5.25 to 1 compression ratio, 12 X 41 axle ratio, 7" X 19" wheels; and 25-EX, present standard carburetter, 11 X 41 axle ratio, 7" X 20" wheels, and 5 to 1 compression ratio. The two cars ran together a distance of 112 miles. 19-EX with carburetter normal, 25-EX half distance carburetter normal, remainder - control two notches weak. High speeds, low speeds, accelerations, were carried out during the run. The amount of petrol used on each car was identical, viz - 11 gallons, giving a consumption of 10.18 m.p.g. G.W.H. | ||
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).