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).
Petrol consumption comparison between two different chassis configurations.
| Identifier | ExFiles\Box 147\5\ scan0179 | |
| Date | 1st April 1941 | |
| Lv. from Rm.{William Robotham - Chief Engineer} c. Jnr.{Charles L. Jenner} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} c. Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden} c. Rm{William Robotham - Chief Engineer}/CTJ. [Handwritten: petrol consumption file 1249] Rm.{William Robotham - Chief Engineer}2/ML.1.4.41. PETROL CONSUMPTION. As you know, we have been having discussions recently as to the relative merits of B.V. and B.II. with regard to fuel economy. One of the difficulties in settling the dispute has been the fact that we have not had a B.II. for comparison. Recently however, we have acquired a B.II. and the following figures, obtained by Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} show the present situation. Investigation to rectify matters are now in hand. "Comparative petrol consumption runs have been carried out with B-214-GA and B-24-AW chassis, over the Ashbourne, Buxton, Belper circuit, at an average speed of 44 m.p.h. with the following results:- B-214-GA = 16.00 M.P.G. B-24-AW = 13.30 M.P.G. The cars were run one behind the other, with B-214-GA leading. The weight of both cars was 34 cwts. 2 qrs. 0 lbs. B-214-GA. B-24-AW. Axle ratio 10 x 41 10 x 43 Tyre size 6.50 x 16 6.50 x 17 E.R.P.mile 2975 3000 Road speed @ 4500 r.p.m. 90.7 m.p.h. 90 m.p.h. Induction systems and carburettor settings production standard for these models. "" Rm.{William Robotham - Chief Engineer} | ||