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).
Power and B.M.E.P. curves for a 4 1/4 Litre Bentley engine with varying induction system restrictions.
| Identifier | ExFiles\Box 112\1\ scan0008 | |
| Date | 1st September 1940 | |
| 4 1/4 LITRE BENTLEY POWER S 40 COMP RATIO 6.3 (E.W. 1296) B III IND'N - SYSTEM (2 H4 S.U. CARBS) ⓐ NO RESTN ⓑ 500 RESTN ⓒ 375 RESTN BHP B.M.E.P. R P M | ||