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).
Petrol consumption test results under various conditions for two different cars.
| Identifier | ExFiles\Box 147\5\ scan0020 | |
| Date | 14th February 1907 | |
| Petrol Consumption X459 3800 Road very heavy. 14/2/07. Works to Snake by L Allen. 60544. total weight 3712 lbs. consumption 12 1/2 miles per gallon. 8 short. .7 taper 70 g.{Mr Griffiths - Chief Accountant / Mr Gnapp} stg. again same car 10/2/07. ditto carb. etc. 14 miles. Works to Snake. 60592. special carb. [drawing] 1 1/8. est. 16 g stg. 5 up run to Derby & back via Ashbourne Leek, greenwoods M.{Mr Moon / Mr Moore} R.{Sir Henry Royce} & C. P. drivers. 15 to 21. m per gall. | ||