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 report from Brooklands comparing different car configurations, with lap times and a brake horsepower vs engine RPM graph.
| Identifier | ExFiles\Box 29\3\ Scan140 | |
| Date | 1st November 1925 | |
| BROOKLANDS Nov. 1925 CONDITION OF CAR. LAP SPEED HALF MILE SPORTS CAR. HIGH COMPRN. 17 TOOTH AXLE. STANDARD CONDITION. C.O. CLOSED. 79.2 80.4 STANDARD CONDITION C.O. OPEN. 80.5 82.6 STANDARD TOURING CAR. 4-1 COMPRN. 15 TOOTH AXLE. STANDARD CONDITION C.O. CLOSED. 74.13 SPORTS CAR. FRONT WINGS REMOVED TOP PANEL OF WIND SCREEN RAISED. C.O. OPEN. 87.8 89.6 ROAD WHEEL B.H.P. ENGINE R.P.M. C.O OPEN C.O. CLOSED STANDARD CAR COMP. RAT. 4-1. HIGH COMPRESSION 5.2 - 1. 2750 R.P.M. 89 M.P.H. 17 x 52 AXLE 3847 | ||