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 report detailing mileage against fuel tank levels.
| Identifier | ExFiles\Box 44\3\ Scan086 | |
| Date | 30th November 1928 | |
| Straight Unit - 1"/16 hole in bell plate. Raised datum on gauge 1/4 gallon. Dry roads. London - Basingstoke and return. 30/11/28. Approx. in tank. Mileage. Gauge. 8 5746 0 5756 5 7 5766 (20) 6 5776 6 6 5786 (40) 6 5796 5.5 5 5806 (60) 5 5816 4.5 4 5826 (80) 4 5836 3.5 3.3 5839 3.3 Note lower speed 25/30 m.p.h. Average consumption 20 m.p.g. Emptied tank 3.3 gallons. | ||