Graph comparing the acceleration performance of various 6-cylinder Rolls-Royce and Bentley cars.
| Identifier | ExFiles\Box 69\4\ scan0318 | |
| Date | 5th October 1926 guessed | |
| COMPARISON OF R.R. AND BENTLEY 6 CYL CARS BENTLEY READINGS X X X 6½ LITRE BENTLEY SPORTS PHANTOM 10 EX STANDARD PHANTOM TOURER ACCN FT/SEC² ROAD SPEED M.P.H. | ||
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).