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).
Comparative consumption tests taken before and after fitting new piston rings.
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page253 | |
| Date | 31th March 1933 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from F.Dodd. 4027a 31.3..33. 3.Per.II. Comparative consumption tests taken before and after fitting new piston rings. ----- Before. Mileage 170.5 Average speed 42.5 mph. Petrol cons. 15.45 m.p.g. Oil cons. 412 m.p.g. After. Mileage 182. Average speed 42.mph. Petrol cons. 15.84 mpg. Oil cons. 416 mpg. Hs{Lord Ernest Hives - Chair}/F.Dodd. | ||