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).
Two graphs comparing the acceleration performance of various open touring car models and engine configurations.
| Identifier | ExFiles\Box 5a\5\ 05-page005 | |
| Date | 1st December 1926 guessed | |
| Top Graph: ACCELERATION HIGH V LOW COMPRESSION RATIO 40/50 VELOCITY M.P.H. TIME SECONDS OPEN TOURING CARS R.E.X. NY EMPTY 2.27 TONS (Comp Ratio 5.2/1) R.E.N.K. NY EMPTY 2.38 TONS (Comp Ratio 4.6/1) R.E.X. 1.5 CWT LIGHTER THAN STANDARD TOURER ALSO MORE SPORTING LINES Bottom Graph: ACCELERATION 20 H.P. V 40/50 VELOCITY M.P.H. TIME SECONDS OPEN TOURING CARS STANDARD PHANTOM 2.34 TONS 20 H.P. EMPTY WT 1.86 TONS Left Side Text: ALL FIGURES DIRECT DRIVE C.O. CLOSED | ||