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).
Log of oil capacity, cylinder compression, and power measurements for various chassis numbers.
| Identifier | ExFiles\Box 19\7\ Scan001 | |
| Date | 10th April 1907 guessed | |
| Oil capacity of cyls. & compressions & powers X790 Chassis N. | Oil Capacity | Compression H.P. | Max: H.P | Remarks | 4400 1136 | 11. 14 1/2 | 73 | 42.9 | Chirps bad 1166 | 11. 14 | 79 | 40 | do. 1193 | 11. 14 | 77 | 38.6 | ,, Fair 1161 | 12. 6 1/2 | 77 | 44 | 1199 | 11. 11 | 80 | 39.6 | 1195 | 11. 15 | 78 | 41 | 1202 | 11. 14 | 88 | 41.4 | 1190 | 11. 15 | 77 | 39.6 | 1184 | 11. 14 1/2 | 78 | 43.2 | 1196 | 12. 4 | 75 | 38 | Chirps good. - | 12. 3 | 75 | 35 | Test Engine | 10. 5 | 84 to 85 | - | Thick top piston Chirps bad Daimler Test N | 10. 7 1/2 | 65 | - | No chirps M.R.a | 11. 6 | 79 | - | Chirps 2 Cyl Car | 11. 0 | 75 | - | Body friction runk leaks badly. 1191 | 11. 9 1/2 | 78 | 42 | No 2 cyls | ||