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 graph for a 20/25 single cylinder engine.
| Identifier | ExFiles\Box 133\2\ scan0010 | |
| Date | 20th March 1934 | |
| V1696 FIG. 20/25 SINGLE CYLINDER ENGINE. STD. BENTLEY TURBULENT CYLINDER HEAD (EB 1517) COMPRESSION RATIO - 6.44. AEROLITE PISTON ZENITH TRIPLE DIFFUSER CARBURETTOR (32% CHOKE). VALVE LIFT - .400" (INLET VALVE EB164, EXHAUST EB165.) VALVE TIMING (.020 CLCS):- I.O. 4° EARLY E.O. 51° EARLY. I.C. 51° LATE E.C. 7° LATE. FUEL: - DTD224. BRAKE HORSE POWER RPM OF ENGINE SP.{Mr Spinney} FUEL CONS. (PTS/BHP/HR.) BMEP (LBS/SQ. IN.) SP.{Mr Spinney} CONS. BHP BMEP 20-3-34. | ||