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 and specification data for various cars, including two Rolls-Royce models.
| Identifier | ExFiles\Box 134\5\ scan0016 | |
| Date | 30th August 1939 guessed | |
| NAME Price Tax c.c. Weight cwts.qrs.lbs. S1 S2 Gr{George Ratcliffe} R Secs. a α η A Max.Speed 17 Armstrong Siddeley (6) £475 £21.5 2394 32 3 13 1.54 1.669 5.10 13.85 11.5 2.550 3.66 69.7 3.66 69 18 Austin (6) £375 £22.10 2510 32 3 6 1.46 1.583 5.10 13.75 11.2 2.620 3.77 69.3 3.77 67 18 Daimler (6) £485 £22.10 2522 30 3 14 1.37 1.490 4.86 13.5 10.6 2.766 3.89 71.1 3.89 74 16.9 Humber (6) £330 £21.5 2577 30 2 30 1.33 1.450 4.89 13.5 12.7 2.310 4.02 57.5 4.02 71 16.9 Hudson (6) £312 £21.5 2732 27 0 18 1.11 1.223 4.55 13.5 9.4 3.120 4.43 70.4 4.43 77 16 Riley (4) £405 £20.0 2443 30 3 17 1.42 1.54 5.5 (3.97) 14.15 8.3 3.535 4.07 86.9 4.07 (84) 17.9 Renault (4) £235 £22.10 2383 24. 1. 13 1.15 1.270 3.7 12.8 11.1 2.641 3.66 72.2 3.66 - 20 Standard (6) £325 £25.0 2664 27. 3. 21 1.17 1.289 4.75 13.5 9.1 3.222 4.39 73.4 4.39 77 18 Salmson (4) £495 £22.10 2328 25. 3. 27 1.25 1.38 4.45 13.55 10.5 2.790 3.83 72.8 3.83 82 Average 2500 28. 2. 25 1.31 1.430 4.77 13.55 10.5 2.840 3.97 71.5 3.97 6.9 Willys (4) £274 £20.0 2199.5 21. 2. 10 1.11 1.237 4.3 12.8 10.8 2.718 4.37 62.2 4.37 68 2 1/2 Litre (RR) (4) £25 2838 28. 0. 0 1.112 1.218 4.5 13.5 9.2 3.178 4.41 72 4.41 do. do. 2838 32. 0. 0 1.268 1.375 4.5 13.5 9.2 3.178 3.9 81.4 3.9 S1 = lbs. per c.c. empty. S2 = lbs. per c.c. with 2 passgrs Gr{George Ratcliffe} = Rear axle gear ratio. R = Rolling radius of tyres. Secs = Time in seconds to accelerate from 10 to 30 M.P.H. with 2 passengers. a = Actual uniform acceleration ft. sec.² α = Possible uniform acceleration ft. sec.² at 100% efficiency for 100 lbs/sq in M.E.P. η = a/α = M.E.P. at the road. A = η is a figure of merit, viz. good actual performance with low engine output. | ||