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 engine performance curves (BHP and BMEP) at different compression ratios.
| Identifier | ExFiles\Box 43\1\ Scan106 | |
| Date | 28th August 1925 guessed | |
| B H P B.M.E.P. R.P.M. CURVE No VII COMPRESSED RATIO COMPARISON CURVES. E COMPRESSION RATIO 5.27/1 F COMPRESSION RATIO 6.09/1 G COMPRESSION RATIO 6.28/1 EAGLE IX CAMSHAFTS INLET VALVE TIMING I.O.C 10 14° I.C. 54° EAGLE VIII CARBS. CORRECTED FOR BAR & TEMP. | ||