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).
Fuel consumption and weight calculations for a run from Monte Carlo to London.
| Identifier | ExFiles\Box 147\5\ scan0001 | |
| Date | 21th May 1906 | |
| 3800x459 see letter C.S.R. 21/5/06 No4 Light 40523. No4 T.T. 1906. Run to Monte Carlo to London. (not driving for consumption engine running without road) 846 miles 37.33 gallons. = 22.6 per gall. Total weight running. 27 cwt 3 qrs 16 lbs. without pass. & coats. 21 . 3 . 10. i.e. consumption per ton mile = 31.5. i.e. if T.T rules (as present weight) = 25.9 i.e. for 100 lbs reduction = 1.1 miles more per gall. The above with 25 tooth pinion. 2 3/8 crown 3 ring piston Main bush bearings. Battery ignition only. P.T.O | ||