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).
The internal condition of a 25 HP engine and the adaptation of a J.1 head for a Continental 25 HP car.
| Identifier | ExFiles\Box 179\2\ img178 | |
| Date | 22th January 1932 | |
| -2- Hs.{Lord Ernest Hives - Chair}2/WJ.22.1.32.Cont'd.{John DeLooze - Company Secretary} The inside of the engine with these powers is looked after by the fact that 1G-G4, the last 10,000 miles car, was the best 25 HP. we have ever stripped, due to the balance weights and larger pins, and we have the crank with still larger journals available for the still higher powers since obtained. The J.1 head we are using has been adapted so that it will fit directly on a Chine cylinder block and give the correct compression ratio with the 1G-G4. Chine connecting rods and pistons. In view of the results obtained and the simplicity of the change over it appears to us that the J.1 head is too good to miss for the Continental 25 HP. car. Hs.{Lord Ernest Hives - Chair} | ||