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).
Acceleration performance test data for a Bentley with different axle configurations and settings.
| Identifier | ExFiles\Box 113\2\ scan0181 | |
| Date | 21th August 1933 | |
| X1728. 21.8.33. ORIGINAL BENTLEY IN FRANCE 11/43 AXLE. The acceleration figures of the car are as follows:- M.P.H. SEC. M.P.H. SEC. 10-20 5 10-20 10-30 8 2/5 20-30 4 3/5 10-40 13 30-40 3 1/5 10-50 18 2/5 40-50 5 2/5 10-60 23 50-60 5 10-70 31 4/5 60-70 7 2/5 10-80 44 4/5 70-80 11 10-80 through gears 38 sec. Acceleration figures with cutout closed, and copper & asbestos gasket. M.P.H. SEC. M.P.H. SEC. 10-20 5 10-20 10-30 8 4/5 20-30 4 1/5 10-40 14 1/5 30-40 4 2/5 10-50 19 40-50 5 1/5 10-60 25 3/5 50-60 6 10-70 32 2/5 60-70 7 3/5 10-80 44 70-80 11 10-80 through gears 42 secs. ---------- I.B.IV. 10 x 41 AXLE. ACCELERATION TESTS WITH CUTOUT CLOSED (Average). Top Gear M.P.H. SEC. M.P.H. SEC. 10-20 4.35 10-20 10-30 8.65 20-30 4.45 10-40 12.6 30-40 4.25 10-50 17 40-50 4.85 10-60 22.95 50-60 5.2 10-70 30.4 60?-70 6.8 10-80 41.4 70-80 12.45 3rd Gear. M.P.H. SEC. 10-20 3.65 10-30 6.45 10-40 10 10-50 13.8 10-60 18.75 10-70 24.3 Standing start through gears to 80 M.P.H. 35.5 sec. STANDARD PETROL; RRZ NEEDLES; PETROL TANK 3/4 FULL; ONE DRIVER AND PASSENGER; | ||