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 Ton Miles Per Gallon for various cars against Miles Per Hour.
| Identifier | ExFiles\Box 147\5\ scan0164 | |
| Date | 14th March 1940 guessed | |
| CONSTANT SPEED TON M.P.G. TON MILES / GALLON = TOTAL CAR WEIGHT (3 UP) IN SHORT TONS (2000 LB/TON) MULTIPLIED BY MILES PER U.S. GALLON. - M.{Mr Moon / Mr Moore} P. H.{Arthur M. Hanbury - Head Complaints} - TON MILES / GALLON 1938 MINX WRAITH BENTLEY V OLDSMOBILE AVERAGE AMERICAN CAR PHANTOM III 1939 CENTURY BUICK 4 B 50 NON-FINALISED DUAL STROMBERG SETTING. | ||