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).
Test results and performance data for a 4-EX Saloon car on various hill climbs.
| Identifier | ExFiles\Box 113\2\ scan0007 | |
| Date | 25th October 1922 | |
| X1725 Mr. Hives. from GWH.{George W. Hancock - Head Chateauroux} 25.10.22. 4-EX Car. X3764 / X1725 Fitted with Saloon body - 15 X 52 axle ratio. Weight of car with two passengers - 2 tons 8 cwts. 1 qr. Tyre pressures - rear 65 lbs. front 60 lbs. The car has been tried on Hazelwood, Quarndon, Pastures and Pistern hills results as follows :- Hazelwood minimum speed - changed down half way up steep portion. Quarndon minimum speed 18.5 m.p.h. Pastures " " 41.5 " Pistern " " Start. 10 m.p.h. Rails 37.4 " Max. 43 First bend. 29.85 Minimum 21.58 Time 1 min. 48.5 secs. Max. speed of car 64.04 M.P.H. ------------------------- Curves attached to X3764 | ||