Performance graph from Brooklands tests comparing clutch horsepower and B.M.E.P against engine RPM for different vehicle configurations.
| Identifier | ExFiles\Box 5a\5\ 05-page139 | |
| Date | 19th June 1931 | |
| H.3. / 401 H.S. / 401 BROOKLANDS TESTS 19/6/31 LAP SPEED C.O. CLOSED 18GX 68.7 M.P.H. G.S.R.14 63 M.P.H. CLUTCH H.P. B.M.E.P. ENGINE R.P.M. ROAD SPEED M.P.H. 18 GX 35.7 CWTS JAPAN(Experimental Engine) UNIT TWIN ZENITHS 26 M {Mr Moon / Mr Moore} /M CHOKES 112° CAMSHAFT P.II REAR SILENCER & FISHTAIL TIMING SEE SHEET 2 C.O. CLOSED 14 G.S.R. 33.7 CWTS CHINA(Experimental Engine) UNIT C/R 5.25 1 7/16 LARGER R.R. CARB C.O. CLOSED 110° SHAFT STD. 25 H.P. SYSTEM E.55794 | ||
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).