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 plotting Horse Power at the Road Wheels against Engine RPM for the Standard Phantom and S.S. Chassis models.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan131 | |
| Date | 7th February 1929 | |
| B.H.P. AT ROAD WHEELS 3RD GEAR CUT OUT OPEN 2000 R.P.M AV: PHANTOM 90.7 B.H.P. MIN: PHANTOM 86.1 B.H.P. S.S. CHASSIS 98 B.H.P. HORSE POWER AT ROAD WHEELS STANDARD PHANTOM AND S.S. CUT OUT CLOSED STANDARD PHANTOM AVERAGE "" MINIMUM S.S. CHASSIS (21EX & 23EX) ENGINE R.P.M. S11/7.2.29 | ||