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).
Hand-drawn graph showing the top gear acceleration curve for a 1924 20 HP Touring Car.
| Identifier | ExFiles\Box 113\2\ scan0125 | |
| Date | 16th September 1927 guessed | |
| VELOCITY M.P.H. 10 20 30 40 50 60 TIME SECS 10 20 30 40 50 60 70 TOP GEAR ACCELERATION CURVE STANDARD 1924 20 H.P. TOURING CAR | ||