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 BHP vs RPM for a 4-cylinder 83x95 engine with two different carburettor setups.
| Identifier | ExFiles\Box 122\1\ scan0146 | |
| Date | 9th February 1933 guessed | |
| 4 cyl. b3x95. 2 S.U. CARBURETORS. 1 STROMBERG DX-2. BHP R.P.M. | ||