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).
Comparing car performance data for a Brooklands lap.
| Identifier | ExFiles\Box 155\1\ scan0319 | |
| Date | 16th March 1939 | |
| 4257/16.39 Brooklands Lap 25/30 74 M.P.H -- 105 B.H.P. 261 OLDS. 79 1/2 M.P.H 95 B.H.P. 230 Packard 80 M.P.H 120 B.H.P. 282 | ||