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 power at road wheels of the Standard and Continental Phantom (17EX) against an average Standard Phantom.
| Identifier | ExFiles\Box 92\2\ scan0002 | |
| Date | 1st February 1926 | |
| STANDARD AND CONTINENTAL PHANTOM (17EX). POWER AT ROAD WHEELS (B.H.P.) ROAD SPEED (M.P.H) 3RD GEAR POWER AT ROAD WHEELS. AVERAGE STD PHANTOM ------- 17EX. : ------ TOP GEAR RATIO 17EX = 3.25 STD = 3.47 IGNITION TIMING ON 17EX = 8° B.T.D.C. COMPRESSION RATIO 17EX = 4.75. CUT OUT CLOSED. FEB 1926 | ||