Report comparing the maximum speeds and acceleration tests of various car models.
| Identifier | ExFiles\Box 155\1\ scan0040 | |
| Date | 28th July 1932 | |
| -2- Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 5/WJ.28.7.32.Cont'd. {John DeLooze - Company Secretary} Maximum Speeds Contd. Car. Lap Speed M.P.H. Continental P.11 75.2 27-H.X. Body. 75.34 19-G4 Limousine. 79.68 J.1 Head. 80.72 We could not run the Continental P.11 C.O. open as it had not one. The lap speeds may all be considered on the low side as there was a great deal of wind, our own synchro-mesh 20/25's. usually lap at about 72 M.P.H. It will be noted that PeregrineExperimental Bentley car never produced / Aero Engine is certainly faster than the 20/25's we are now selling, whilst the J.1 is approximately 10 M.P.H. faster than these cars and 4½ M.P.H. faster than the Continental P.11 with the C.O. closed. PeregrineExperimental Bentley car never produced / Aero Engine behaved well at speed, but there was an indication of crankshaft period at 75 M.P.H. and above, which will be catered for in the modifications suggested in R.1/422.7.32 The car can without difficulty be run up to 75 M.P.H. on the road on down grades, and ran up to 79 M.P.H. on the track with a following wind. 19-G4, the J.1 was quite smooth at maximum speed and lapped consistently without signs of distress on L.K.S.6 14 mm. plugs. The body was almost exactly similar to the trials 20/25 that lapped at 69 M.P.H. The B.H.P. available on 19-G4. at 80 M.P.H. was 102, on the synchro-mesh 25 HP. 60 approx. ACCELERATION TESTS. It was established that 19-G4 represented thea average 25 HP. in weight being 36½ cwt., almost exactly the same as the trials car with which it was compared. Side by side acceleration tests shewed that from 10-20 M.P.H. the acceleration of 19-G4 was very slightly better than the standard car, and at all other speeds very definitely so. The tests were then repeated with 19-G4. and the Continental Phantom, both cars carrying two occupants, with exactly the same results except that the difference in performance was less marked. | ||
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).