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).
Vehicle performance tests including acceleration, tractive resistance, fuel consumption, and hill climb results.
| Identifier | ExFiles\Box 22\2\ Scan026 | |
| Date | 5th November 1923 | |
| R.R. 403A.(40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. Expl. No. 4609 REF: Hs{Lord Ernest Hives - Chair}4/LG5.11.23 RUNNING CONDITION :- Tool kit, spare wheels, petrol - no passengers. TOTAL WEIGHT - 4984 lbs. Front - 2492 lbs. N.S. 2492 lbs. Rear - 2492 lbs. O.S. 2492 lbs. ACCELERATION. M.P.H. | TOP GEAR. | SECOND GEAR. | BOTTOM GEAR. 10 | 2.25 f.p.s. | 3.8 f.p.s. | 5 f.p.s. 15 | 2.5 " | ---- | 4 f.p.s. 20 | 2.2 " | 3.3 " | 2.7 " 30 | 1.8 " | 2.6 " | ---- 40 | 1.325 " | 1.5 " | ---- 50 | .9 " | ---- | ---- 55 | .45 " | ---- | ---- TRACTIVE RESISTANCE. M.P.H. | Lbs. per ton. 55 | 122¼ 50 | 100 40 | 83 30 | 67 20 | 53 10 | 41 PETROL CONSUMPTION:- 16.34 M.P.G. at 30 M.P.H. PERFORMANCE ON PISTERN HILL. Start. | Max. | Min. | Finish. | Time. 10 | 40 | 22 | 27 | 1 min. 51 4/5 secs. 10 | 42 | 22 | 29 | 1 min. 45 3/5 secs. 10 | 44¼ | 24 | 32 | 1 min. 42¾ secs. A good 20 HP. R-R.{Sir Henry Royce} | ||