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).
Comparative data table of various cars, detailing weight, speed, horsepower, and wind resistance.
| Identifier | ExFiles\Box 108\2\ scan0158 | |
| Date | 15th August 1938 | |
| 600 CAR. TOTAL WT. 2 PASS: ROAD WHEEL HP. AT MAX. LAP SPEED. MAX. LAP SPEED WEIGHT ON FRONT WHEELS TONS. FRONTAL AREA OF CAR SQ. FT. Windage & Tractive Resis. M.P.H pr H.P. Factor b. C. FRONTAL AREA OF SPECIFIC WIND RESISTANCE. ROAD WHEEL H.P. TO LAP @ 80 M.P.H. P.III CLOSE-COUPLED 2.7 127.5 91 1.2 28.8 .059 .00205 86.5 WRAITH ✓ CLOSE COUPLED 2.05 65 74 .95 27.2 .055 .002 81 B.III 1.84 90 87.2 .9 24.06 .047 .00195 69.8 PACKARD 1.72 72 81 .8 26.4 .047 .00178 69.2 OLDSMOBILE 1.70 57.5 77 .8 25.6 .043 .00168 64.5 FORD V.8 1.51 58 81.6 .75 23.80 .036 .00150 55 PAULIN 1.70 90 * 97 * .8 24.5 .033 .00134 51 * Tentative figures. /R.15.8.38. | ||