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 output and valve timing diagram for a 3 1/2 Litre Bentley engine.
| Identifier | ExFiles\Box 86\1\ scan0063 | |
| Date | 12th February 1923 | |
| UNIT B. 4.A. 3 1/2 LITRE BENTLEY. POWER OUTPUT 12. 2. 23 SPEC. ① COMP. RATIO 6·45:1 (E.B. 615) IN. VALVE E.B. 164 (1·400 DIA) EX. VALVE E.B. 165 (1·300 DIA.) ② COMP. RATIO 6·80:1 (Lec 3662) IN. VALVE EX. 12089 (1·500 DIA.) EX. VALVE E.B 1325 (1·200 DIA.) STANDARD PISTONS. B.H.P. R.P.M. B.M.E.P. T.D.C B.D.C (TAPPETS @ ·020) Ex. IN 36° 76°3' 49°2' 50° | ||