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).
Reasonable cylinder bore wear for a 4 1/4 litre Bentley.
| Identifier | ExFiles\Box 146\5\ scan0215 | |
| Date | 26th September 1939 | |
| 1245 W/P. To Sr/VA. from Rm.{William Robotham - Chief Engineer} Rm.{William Robotham - Chief Engineer}5/MH.{M. Huckerby}26.9.39. With reference to your note re Mr. Duckham's 4¼-litre Bentley, it is almost impossible to give an opinion as to whether the cylinder bore wear of the car is average without knowing the conditions under which the car is used. Generally speaking, however, we should say that a cylinder bore wear in the worst place of about 1½ tenths per thousand miles is reasonable. We have had cars which are both better and worse than this. Rm.{William Robotham - Chief Engineer} | ||