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 test results for a car with a large test body.
| Identifier | ExFiles\Box 147\5\ scan0022 | |
| Date | 2nd March 1907 guessed | |
| X459 60528 3800 short. No 6. car. 60502. Long chassis. Tested with large test body. (400 lbs) 4 up & 3 up return To. Knutsford & back to. 32 miles. (no special load test for consumption) 1 4/5 gallons petrol. 17.5 miles per gallon 24 pinion back axle. | ||