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).
Improved performance tests for the 25 HP model, including acceleration and hill climbing results.
| Identifier | ExFiles\Box 181\M13\M13.2\ img083 | |
| Date | 19th August 1931 | |
| To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} E.{Mr Elliott - Chief Engineer} c. to Ey. ORIGINAL Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}9/WJ.19.8.31. IMPROVED PERFORMANCE 25 HP. X5770. Y5771. With a view to confirming the low speed performance of the car on which the recent higher speeds were obtained on Brooklands, we have carried out some acceleration and hill climbing tests the results of which are attached. It will be observed that up to 50 M.P.H. the performance of this car, with its light body, is almost equal to that of a standard P.II, in fact is slightly better with the low depression carburetter. On our two standard test hills a marked improvement in performance is obtained over the standard unit and silencer fitted in the same car. We are repeating these figures with a 12 x 50 axle, as it may be considered desirable to use such a ratio to save the power unit and would almost certainly be preferred with a silent higher easy change third, as on the new gearbox. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||