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).
Hand-drawn performance comparison of a 28 HP Oldsmobile and a 30 HP Rolls-Royce, including data tables for acceleration/deceleration times and a graph of Horsepower vs. MPH.
| Identifier | ExFiles\Box 155\1\ scan0321 | |
| Date | 24th June 1937 guessed | |
| Acceleration figures [Table 1] 28 HP OLDS. | 30 HP. 22-95 70 | 8.45 un | 7.1 un 60 | 10.55 | 11.8 50 | 14.15 | 17.6 40 | 17.75 | 19.0 30 | 21.4 | 22.0 20 | 10 | 26.5 | 26.0 [Table 2] Deceleration figures Average on Salt Box Straight. OLDS. | 30HP. 60 | 25.4 | 32.8 50 | 17.7 | 22.9 40 | 10.6 | 15.9 30 | 6.38 | 7.53 20 | 3.55 | 4.59 Weight 22-95 40 cwt. 2 qr (No passenger) [Legend] _______ OLDSMOBILE - - - - - 30 HP Rolls. [Table 3] FROM 70 AT ADDITIONAL 10 MPH - HP. - 60 | 8.45 | 7.5 50 | 19.0 | 18.9 40 | 33.15 | 31.5 30 | 50.9 | 50.5 20 | 72.30 | 73.0 10 | 98.75 | 99.0 secs. [Graph] Y-Axis Left: HP, OLDSMOBILE Y-Axis Right: SECS. X-Axis: M.P.H. Curve 1: 30 H.P. R.R. Curve 2: 28H.P. OLDS. [Bottom Right] FD{Frank Dodd - Bodies} | ||