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).
Power curve graph comparing the performance of 3½ Litre and 4¼ Litre engines, including acceleration figures.
| Identifier | ExFiles\Box 82\4\ scan0253 | |
| Date | 8th February 1936 | |
| POWER CURVE ON UNIT TEST BED OF TWO ENGINES IN B.83 F.C. TRIALS CAR. (ENGINES FITTED WITH CHASSIS EXHAUST SYSTEM.) ACCELERATION FIGURES WITH TWO PASSENGERS | | 3½ | 4¼ | |---|---|---| | 10 - 20 | 3.5 | 3.0 | | 10 - 30 | 7.8 | 6.2 | | 10 - 40 | 10.0 | 8.6 | | 10 - 50 | 14.0 | 11.6 | | 10 - 60 | 20.2 | 16.0 | | 10 - 70 | 26.6 | 20.0 | CAR WEIGHT FULL TANK BUT NO PASSENGERS 33 CWTS 52 LBS Graph Labels: 4¼ LITRE 3½ LITRE PTS. PER HP HOUR Axes: H.P. R.P.M. Initials: CH | ||