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).
Analysing the improbable performance claims of a 45 HP Renault competitor vehicle.
| Identifier | ExFiles\Box 32\2\ Scan060 | |
| Date | 21th March 1925 | |
| R.R. 493A (50B) (D.B. 175 25-9-24) J.H.D. -2- EXPERIMENTAL REPORT. Expl. No. REF Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG21.3.25. where they could ensure they were not being misled by the speedometer, and Brooklands has been closed for some months. As it is, it would seem that if any firm definitely set their stall out to dupe 'The Motor' representative, they could obtain phenomenal results which would be an excellent advertisement and make the correct results of other firms look quite insignificant. We have selected the acceleration curve of the 45 HP. Renault as being a particularly flagrant example of improbable performance. This car may be considered a serious competitor to the E.A.C. The readings from which this curve has been drawn are obviously inaccurate. We have taken considerable trouble to reconstruct the H.P. curve which would be necessary if such results were to be possible. It will be observed that this hypothetical curve is concave up to 2000 r.p.m., an inconceivable state of affairs with a normal touring car with a nromal body. This is because 'The Motor' tests shew the car to have a constant acceleration from 20 to 60 m.p.h. It is interesting to compare it with that of the 40/50 acceleration. Besides the convexity of the curve, the H.P. required at 2000 r.p.m. is 170, the makers only claim 140 ay 2400 r.p.m. We think it most improbable that the closed car Renault can do over 85 m.p.h. with its 3.5 axle ratio. As will be seen from our figures, we estimate the maximum speed at 79 m.p.h. In this weeks 'Autocar', the Renault contd :- | ||