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).
Compression test on a 1910 type standard engine using oil instead of a gauge.
| Identifier | ExFiles\Box 19\7\ Scan020 | |
| Date | 29th July 1909 | |
| R.R. 256m (100 T) S.H. 89. 22-7-20) G 2769 X.790. Compression of 1910 type standard engine tested with oil instead of gauge - worked out at 75 lbs. Test taken 29.7.09. - By Lowe. | ||