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 | ||
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).