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 data sheet with resistance and horsepower figures for a 1935 Park Ward 4 door saloon.
| Identifier | ExFiles\Box 84\3\ scan0119 | |
| Date | 7th March 1939 guessed | |
| Copy. *1935 Park Ward 4 door saloon 181.CW, all up weight 4060 lbs. Speed MPH. Resistance lbs. HP. 95 418 106 ) 90 382 91.5 ) Extrapolated. 85 356 78 ) 80 311 66 ) 75 282 56 ) 70 248 46 ) 65 224 39 ) 60 196 31 ) 55 169 25 ) 50 146 19.5 ) 45 127 15.2 ) Observed. 40 114 12.1 ) 35 97 9.0 ) 30 85 6.8 ) 25 71 4.7 ) 20 64 3.4 ) 15 57 2.3 ) Closest Approximation Resistance=(46+.0413V²) lbs. where V is in m.p.h. (a) Equivalent flat plate area = 16.0 sq.ft. (b) Projected frontal area = 23.2 sq.ft. Ratio (a)/(b) = 0.69 Measured by plotting V against t while decelerating in neutral on a very level road. The figures are the mean of several runs. I should be very interested if you could let me have the corresponding figures for the streamlined Bentley. | ||