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).
Dynamometer graph plotting Horsepower against RPM for a 20HP chassis.
| Identifier | ExFiles\Box 74\4\ scan0193 | |
| Date | 3rd March 1925 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Average of last 50 chassis - Dyno - 20HP. H.P. 50 40 30 20 10 0 R.P.M 0 500 1000 1500 2000 2500 3000 3/3/25 HR | ||