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).
Multi-day performance chart tracking average speed, temperatures, and petrol consumption, with readings taken every 25 miles.
| Identifier | ExFiles\Box 82\2\ scan0179 | |
| Date | 14th July 1934 | |
| 4 B. IV READINGS EVERY 25 MILES MORNING. AFTERNOON. AFTERNOON. MORNING. AFTERNOON. MORNING. AVERAG SPEED 42 M.P.H. 41.2 51.1 M.P.H. 51.6 M.P.H. 50.04 50.06 M.P.H. DATE 9/7/34 10/7/34 12/7/34 13/7/34 * 14/7/34 20MPG. 10MPG. PETROL CON. °c 90°c 80°c 70°c 60°c 50°c WATER TEMP. OIL TEMP. 40°c 30°c 20°c 10°c AIR TEMP. DRIVERS G.W.H. G.W.H. ABR{A. B. Roberts} PATTINSON. ROSE. PATTINSON. ROSE. MARTINDALE. ROBERTS. MARTINDALE. ROBERTS. MILES 210. 309. 230. 335. 387. 367. | ||