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).
250-mile road test in the Wales district detailing fuel consumption, road conditions, and load.
| Identifier | ExFiles\Box 147\5\ scan0021 | |
| Date | 2nd March 1907 | |
| x459 3800.[strikethrough] 60546- The Royce 250 mile run Wales district week end 2/3/07. Average consumption 17 to 18 per gallon 3 & 4 gear. 5 cwt body. Road fair - sometimes dry sometimes heavy. Load. 4 adults (150 lbs) (1+chassis) [strikethrough] 3060 lbs 18 / tu gal = 24.6 ton miles per gallon Weight of above (no passengers) testie by M 22 cwt. 60581. 80 miles Buxton & daily. 7 bal. average. 20. — 91 ditto. 18. | ||