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 comparing the constant speed Miles Per Gallon (M.P.G.) for various car models.
| Identifier | ExFiles\Box 147\5\ scan0165 | |
| Date | 18th March 1940 guessed | |
| CONSTANT SPEED M.P.G., M.{Mr Moon / Mr Moore} P. G.{Mr Griffiths - Chief Accountant / Mr Gnapp}, M.{Mr Moon / Mr Moore} P. H.{Arthur M. Hanbury - Head Complaints}, 1938 MINX, BENTLEY V, OLDSMOBILE, WRAITH, 1939 CENTURY, BUICK, 4 B 50, PHANTOM III | ||