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 an Alfa-Romeo engine's boost pressure and temperature against RPM.
| Identifier | ExFiles\Box 179\2\ img229 | |
| Date | 4th December 1925 guessed | |
| ALFA-ROMEO BOOST PRESSURE & TEMPERATURE BAROMETER 766 M/M INTAKE TEMPERATURE 12°C BOOST TEMPERATURE BOOST PRESSURE BOOST PRESSURE INS. MERCURY BOOST TEMPERATURE °C R.P.M. V130 | ||