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 comparison graph and data table for the 1760cc Alfa Romeo and 2364cc Peregrine engines.
| Identifier | ExFiles\Box 124\5\ scan0092 | |
| Date | 27th July 1932 guessed | |
| COMPARISON OF 1760 CC ALFA ROMEO X 2364 CC PEREGRINE BOTH CURVES OPEN EXHAUST Table Data: | | COMP RATIO | INLET THROAT AREA/LITRE | DURATION OF INLET VALVE OPENING | BOOST AT 4000RPM | BOOST TEMP. 4500RPM | |-------------|------------|---------------------------|---------------------------------|------------------|---------------------| | PEREGRINE | 5.85 | 2.69 | 220 | 14" HG | 70°C | | ALFA ROMEO | 5.35 | 3.28 | 233 | 12" HG | 45°C | Valve Timing Diagrams: PEREGRINE: TDC 11, IN .020 CLCE 40, EX 40 ALFA ROMEO (27 10-B): TDC, IN .020 CLCE 40, EX 53.5 Graph Data: - Y-Axis (Left): B.H.P. PER LITRE (10, 20, 30, 40) - X-Axis: RPM (500 to 5000) - Y-Axis (Right): B.M.E.P. (100 to 140) Graph Labels: - PEREGRINE INDUCTION PIPE WATER COOLED - PEREGRINE (B.H.P./LITRE curve) - ALFA (B.H.P./LITRE curve) - B.M.E.P. (B.M.E.P. curves) | ||