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 Phantom and S.S. chassis models.
| Identifier | ExFiles\Box 136\5\ scan0180 | |
| Date | 7th February 1929 | |
| H.P. AT ROAD WHEELS, ENGINE R.P.M., 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), 9/1, 7.2.29 | ||