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).
Graph comparing the fuel economy of two different induction systems for a 4 1/4 Litre Bentley.
| Identifier | ExFiles\Box 99\1\ scan0021 | |
| Date | 1st January 1933 guessed | |
| 4 1/4 LITRE BENTLEY PART THROTTLE FUEL ECONOMY S.36 COMP. RATIO 6·3:1 (F.W. 1296) ① STD. WRAITH INDN. SYSTEM (SINGLE D.C. 42 STROMBERG) ② EX. 27980 INDN. PIPE WITH DUPLEX CARB. (TYPE A.{Mr Adams} A.{Mr Adams} 25 STROMBERG) IDEAL PART THROTTLE MIXTURE FOR 'ROAD LOAD' FULL THROTTLE WEAKEST MAINTAINED CONS Pts/B.H.P./HR. R.P.M. | ||