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).
Notice regarding the correct type of replacement pistons for 4¼ Litre Bentley models.
| Identifier | ExFiles\Box 114\3\ scan0192 | |
| Date | 16th October 1937 | |
| COPY. Hd.{Mr Hayward/Mr Huddy} 4¼ Litre Bentley - Pistons. It is most important that where it is necessary to fit new pistons, the same type should be used as originally fitted. This may mean carrying more stock of pistons but if for example an early 4¼ litre chassis was fitted with the latest type piston, i.e. with slightly increased dia. skirt, trouble may very easily occur due to lack of oil. BY.{R.W. Bailey - Chief Engineer} | ||