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 of compression pressures versus RPM for an Alfa-Romeo unit.
| Identifier | ExFiles\Box 124\5\ scan0034 | |
| Date | 5th February 1932 | |
| UNIT ALFA-ROMEO COMPRESSION PRESSURES COMPRESSION RATIO 5.35:1 COMPRESSION PRESSURE LBS/sq" R.P.M. V1300 170 160 150 140 130 120 110 1000 1500 2000 2500 3000 3500 4000 4500 R.H. 5-2-32 | ||