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).
Dynamometer brake horsepower test results at the road wheels for a 1938 38 HP Buick Century.
| Identifier | ExFiles\Box 125\3\ scan0059 | |
| Date | 10th November 1938 | |
| 1938 TYPE CAR OWNED BY R.{Sir Henry Royce} BANKS, ESQ. 38 H.P. BUICK CENTURY DYNO BHP AT ROAD WHEELS BAR: .758" B.H.P. DIRECT GEAR 3.9:1 CORRECTED TO 15° C | 50° C 2000 R.P.M. | 78.5 - 75.6 2,500 R.P.M. | 91.9 - 86.2 3,000 R.P.M. | 97.9 - 91.7 3,500 R.P.M. | 99.2 - 93.2 3,750 R.P.M. | 93.4 - 87.7 4,000 R.P.M. | 86.9 - 82.5 TYPICAL DYNO BHP AT ROAD WHEELS FOR A 4 1/4 LITRE BENTLEY. ROAD WHEELS 7" x 15" EFFECTIVE TYRE CIR: AT 45 LBS. PRESSURE 88.5" PISTON DISPLACEMENT 320.2 CU: INS: COMPRESSION RATIO 6.35 : 1 AS TESTED ON DYNO CORR. TO 50°C DYNO BY W. BRAZIER AXIS LABELS: M.P.H. B.H.P. R.P.M. ENGINE R.P.M. | ||