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 engine RPM against road speeds in MPH for a 25 Vauxhall with 6.25 x 16 tyres.
| Identifier | ExFiles\Box 127\4\ scan0056 | |
| Date | 29th June 1937 guessed | |
| PLEASE FILE 25 VAUXHALL ENGINE. RPM AT ROAD SPEEDS 6.25 x 16 TYRES M.P.H. R.P.M. Top 3RD 2ND 1ST FD.{Frank Dodd - Bodies} | ||