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).
Extract from a report on vehicle 2.EX, detailing mileage, fuel consumption, and engine performance.
| Identifier | Morton\M7\ img027 | |
| Date | 4th March 1920 | |
| X.3056 2.EX 4/3/20 Extract from REPORT ON 2.EX. X.3056. Mileage for the eight days 1348 making total 6578 miles. Petrol consumption for eight days 475 litres. Petrol consumption has considerably improved since the Goodyear tyres were taken off. Piston knock when starting up cold is only just noticeable at times since fixing extra oil valve open. T.H. Maddocks. | ||