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).
Performance graph comparing the acceleration curves for three different car models.
| Identifier | ExFiles\Box 127\4\ scan0044 | |
| Date | 26th May 1937 | |
| COMPLETE CARS IN ALL CASES COMPLETE PETROL - OIL - WATER M.P.H SECS. ACCELERATION CURVE R.R. 25/30 H.P. 42 CWTS. WITH 2 PASS VAUXHALL 25 H.P. 33 CWTS. WITH 2 PASS R.R. 20/25 H.P. 41 CWTS. WITH 2 PASS F.D / 26.5.37 | ||