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).
Table of dynamometer test results for engine 98-NK, showing horsepower readings before the Brooklands test.
| Identifier | ExFiles\Box 160\2\ scan0044 | |
| Date | 25th September 1924 guessed | |
| DYNAMOMETER CURVE - EAC. 98-NK - BEFORE BROOKLANDS TEST. | | H.P. | | | R.P.M. | C.O. open. | C.O. closed | | 500 | 24.5 | 24.1 | | 1000 | 46.5 | 45.7 | | 1500 | 66.7 | 64.5 | | 2000 | 81.25 | 75.0 | | 2500 | 79 | 71 | contd :- | ||