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).
Power curve graph comparing a naturally aspirated Bentley engine with estimated and measured supercharged configurations.
| Identifier | ExFiles\Box 140\1\ scan0092 | |
| Date | 17th December 1934 | |
| BENTLEY POWER WITH GRAHAN TYPE SUPERCHARGER B.H.P. 170, 160, 150, 140, 130, 120, 110, 100, 90, 80, 70 1500, 2000, 2500, 3000, 3500, 4000, 4500 1) ESTIMATED POWER OUTPUT WITH 60% EFFICIENT BLOWER. S.U. CARB. NO HEAT AT HIGH SPEEDS 2) MEASURED OUTPUT GRAHAN SUPERCHARGER 35% EFF. STROMBERG CARB. WATER HEATED CASE 3) NATURALLY ASPIRATED BENTLEY C/R 6.4 ALL BLOWER SPEEDS 5.5/1 ENGINE SPEED STANDARD BENTLEY CAMSHAFT. | ||