Weight and power specifications for the Phantom III 12-cylinder 7300cc engine.
| Identifier | ExFiles\Box 91\1\ scan0542 | |
| Date | 23th September 1938 guessed | |
| PH.III 12 CYL. 3¼ x 4½. 7300 cc. Engine, as in photograph, less flywheel, clutch, starter motor and dynamo 693 lbs. Dynamo (200 watt).. 31 lbs. Starter Motor...... 31 lbs. Drive & Straps..... 6 lbs. Total: 68 lbs. Flywheel and Clutch (Not standard) 60 lbs. Total: 821 lbs. Peak B.H.P. 232 at 4000 R.P.M. | ||
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).