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).
List of high compression engine numbers that have had their compression lowered since leaving the works.
| Identifier | ExFiles\Box 19\7\ Scan014 | |
| Date | 18th August 1910 | |
| (2) High Compression Engines (Contd) The following have had the compression lowered since leaving the Works - 1195 1174 1189 1118 1184 1106 1181 1105 1111 1114 1014 1258 1166 1108 1177 1008 982 1000 919 986 990 984 978 987 976 958 950 949 945 955 929 1175 1178 1212 1186 1181 1282. A.J.Deas. R.R. 2932A (100M) (F 355. 18.8.10) E.P. 7252. | ||