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).
Performance comparison of maximum speeds and acceleration times for various cars.
| Identifier | ExFiles\Box 47\1\ Scan209 | |
| Date | 14th December 1925 guessed | |
| Rolls-Royce ... 86 m.p.h. Vauxhall ... 93 " From standing start to:- 3 litre Sunbeam. Old type 30/98 side valve Vauxhall. 30 m.p.h. 7.5 secs. 6.7 secs. 40 " 11.3 " 11.2 " 50 " 19.0 " 17.4 " 60 " 24.5 " 23.6 " [Watermark: COPY] | ||