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 comparison graph from Brooklands tests, showing B.HP and B.M.E.P against R.P.M. for two car configurations.
| Identifier | ExFiles\Box 155\1\ scan0043 | |
| Date | 26th July 1932 | |
| BROOKLANDS TESTS JULY 26TH / 32 RM.{William Robotham - Chief Engineer} 71 ① 19.G.IV J1. HEAD 6.3:1 C/R.{Sir Henry Royce} 2 S.U. CARBS. E.57177 (110 5°) CAMSHAFT. NO FRONT EXPANSION BOX. RESONANCE SILENCER. ② U SERIES 20/25 TRIALS CAR FRONT EXPANSION BOX & STANDARD P.II SHORT TYPE SILENCER LAP SPEED 80.72 M.P.H LAP SPEED 69 M.P.H OPEN B.S.T Valve Timing Diagram: EX. 1020 CLCE IN 43.7 42.8 4.4 6.1 BOTH CARS 11x50 AXLES 19x6" TYRES Axes: B.H.P. B.M.E.P. R.P.M. SPEED M.P.H. | ||