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).
Performance issues of the 25 HP car in France and the solution of sending a higher compression cylinder head.
| Identifier | ExFiles\Box 5a\4\ 04-page166 | |
| Date | 19th December 1934 | |
| X5840 To Eg. From Hs.{Lord Ernest Hives - Chair} c. to C. c. to Wor.{Arthur Wormald - General Works Manager} c. to S. Hs.{Lord Ernest Hives - Chair}19/W.S.12.34. 25 HP. PERFORMANCE. As a result of the tests of the 25 HP. cars in Paris and a discussion with Mr. on Poberajesky's we have arrange to send out to Paris a cylinder head to suit that car which will give a higher compression ratio. Summarising the tests in Paris the results were that after C.T.E. had made sure that all the cars were adjusted correctly there was very little difference in performance compare with 19-C-17, 11-C-17, and Poberajesky's car. It amounted to a car's length in 5 kilometers. The real complaint is that the 25 HP. car performance is below the average car in France. The high compression head may satisfy the continental owners but the real answer to the trouble is the 'Wraith'. Hs.{Lord Ernest Hives - Chair} | ||