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 results for chassis 939 at Brooklands, detailing lap and speed times.
| Identifier | ExFiles\Box 29\3\ Scan002 | |
| Date | 6th May 1909 | |
| R.R. 148 (20 H) (H.{Arthur M. Hanbury - Head Complaints} 360. 16.9.09) E.P. 4941. X1788 4200(struck through) F700(struck through) Tests made on Chassis 939 on Brooklands by Hives in company with the Club Engineer 5 & 6/5/09. Chassis loaded up to weigh 2 Tons with driver & passenger. Fitted with 2 Seater Test Body with Hood No wind screen. Mudguards fitted. (Test type). Windage area = 22.7 sq. ft. approx: Times. Lap min sec.: 2.54 1/2 mile fast: 31 sec, 29 1/5", 28 1/2 mile slow: 8' 25", 9' 15", 9' 2" (all 3rd gear) Fastest Times 2.54 28 secs. (OVER) | ||