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).
Consumption test results for a chassis tested on a dynamometer.
| Identifier | ExFiles\Box 147\5\ scan0007 | |
| Date | 11th November 1909 | |
| R.R. 148 (20 H) (H.{Arthur M. Hanbury - Head Complaints} 448. 20.10.09) E.P. 5187 CONSUMPTION TESTS X459 11-11-09 3800 (2300) R-R Car tested on Dynamometer- assume 80% efficiency of transmission Tested chassis No. 1156 - 40 HP on road wheels i.e. - 50 HP HP HOUR PER GALLON --- 11.6 | Daimler R.A.C) 11.79. EP{G. Eric Platford - Chief Quality Engineer} | ||