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 chart of various Phantom and Vulture engine configurations versus RPM.
| Identifier | ExFiles\Box 92\2\ scan0191 | |
| Date | 12th December 1933 guessed | |
| COMPARISON OF 8 LITRE PHANTOM 6-1 C/R LARGE CARB. LE C 3432 AND 7.6 LITRE PHANTOM 5.25 C/R STANDARD SEMI-EXPANDING CARBURETTER I.E. MY. CHASSIS UNITS COMPARED WITH VULTURE UNIT ALL TESTS 114° CAMSHAFT (E.{Mr Elliott - Chief Engineer} 82448) OPEN EXHAUST. VULTURE ENGINE MY. CHASSIS ENGINE B.H.P. M.E.P LBS / □" R.P.M. | ||