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).
Graph plotting petrol consumption in miles per gallon against speed in M.P.H. for a Vauxhall 10 car.
| Identifier | ExFiles\Box 127\4\ scan0105 | |
| Date | 14th March 1938 guessed | |
| FILE VAUXHALL 10 PETROL CONSUMPTION. MILES / GALLON M.P.H. CONST SPEEDS, TOP GEAR AND SMALL THROTTLE OPENINGS. ZENITH MILEAGE TESTER USED. AVERAGE SPEEDS AND NORMAL DRIVING CONDITIONS. | ||