Rolls-Royce Archives
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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 table of performance data for various car models.

Identifier  ExFiles\Box 161\1\  scan0178
Date  15th August 1938
  
1380
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. | C FRONTAL AREA OR SPECIFIC WIND RESISTANCE. | ROAD WHEEL H.P. TO LAP @ 80 M.P.H.
(Handwritten note above 'C' column): Windage Tractive Res: / M.P.H.^2 for factor 'C'
P.III CLOSE-COUPLED. | 2.7 | 127.5 | 91 | 1.2 | 28.8 | .059 | .00205 | 86.5 (82.5 struck through)
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
15.8.38.
* Tentative figures.
  
  


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