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 tests for various Bentley III car configurations.
| Identifier | ExFiles\Box 122\4\ scan0209 | |
| Date | 29th October 1938 | |
| To By.{R.W. Bailey - Chief Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to Da.{Bernard Day - Chassis Design} c. to Wx. c. to Da{Bernard Day - Chassis Design}/JHR. Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe}3/JH.29.10.38. BENTLEY III PETROL CONSUMPTION. The following cars were used for test and comparison - | | B.III. 7.B.V. | B.II-6.B.IV. | 3.B.IV. | |---|---|---|---| | Carburetters. | Twin 1 1/2" S.U. | Twin 1 1/2" S.U. | Twin 1 1/2" S.U. | | Tyre Size. | 6.50 x 16. | 6.50 x 17 | 6.50 x 17. | | Axle ratio. | 10.43 | 10.43 | 10.43 | All cars fitted with overdrive gearbox. ............ Average speed runs to compare various jet tube and needle assemblies were made with the cars 7.B.V. and 6.B.IV. The cars were driven one behind the other to Buxton and back (72 miles) at an average speed of approx. 60 M.P.H. Constant speed tests on 7.B.V. were compared with similar tests carried out on the standard Bentley II 3.B.IV. Cont'd.{John DeLooze - Company Secretary} | ||