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 illustrating the inlet valve lift for an Alfa-Romeo unit.
| Identifier | ExFiles\Box 179\2\ img236 | |
| Date | 8th February 1929 guessed | |
| UNIT ALFA-ROMEO INLET VALVE LIFT OPENING 0.325 0.300 0.275 0.250 0.225 0.200 0.175 148 | ||