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 power output and ignition advance for a new aluminium engine and a standard engine.
| Identifier | ExFiles\Box 69\4\ scan0325 | |
| Date | 27th September 1926 | |
| POWER OUTPUT & IGNITION ADVANCE FOR THE NEW ALUM. ENG. AND STD ENGINE. PARK ADVANCE. DEGREES. B.H.P. B.M.E.P. lbs/□" R.P.M. SYNCHRONISED IGN. STD ENG. SINGLE IGN ON LIGHTER PHANTOM SYNCHRONISED IGNS NEW ENG. NEW ENG. STD ENG NEW ALUM. ENG. 4.45 COMP. RATIO. STD 4.1/1 COMP. RATIO ENGINE. STD. SILENCER WITH CUT OUT OPEN. STD VALVE TIMING. COMP. RATIO. STD. ENG 4.1 TO 1. " " NEW. " 4.45 TO 1. | ||