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).
Performance test report detailing speeds, temperatures, and fuel consumption.
| Identifier | ExFiles\Box 125\3\ scan0095 | |
| Date | 14th March 1939 | |
| -2- Lap speed 90.88 M.P.H. 1 min. 49.6 secs. ½ mile 90 m.p.h. against wind. ¼ mile standing start 20 secs. ½ " " " 32 secs. Speedometer check. Clock Actual Error. 30 29 1 45 42.8 2.2 60 57 3 75 68.5 6.5 Maximum oil temperature. reached was 107.5°C. We were never under the impression that this would mount higher as in the case of the Humber. Maximum under bonnet temperature. 42.5°C. Outside air temp. 11°C. Petrol Consumption to track ave. speed 45 m.p.h. = 11.4 m.p.g. return 40 m.p.h. = 12.7 m.p.g. ************** | ||