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).
The acceleration performance of a 25/30 HP car with a large bore engine.
| Identifier | ExFiles\Box 101\3\ scan0019 | |
| Date | 12th June 1936 | |
| W/S - Cx.{Major Len W. Cox - Advertising Manager} c. to By.{R.W. Bailey - Chief Engineer} X500 Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}16/KW.12.6.36. 25/30 H.P. Acceleration. ___________________________ Replying to Cx.{Major Len W. Cox - Advertising Manager}3/KW.11.6.36. GAE-20 car is now fitted with a large bore engine. The weight of the car is very nearly 39 cwts., and was tested with 2 people on board. The acceleration times of the mean in two directions, allowing for speedometer errors, were :- 10 - 20 M.P.H. 4.23 secs. 10 - 30 " 8.43 " 10 - 40 " 13.73 " 10 - 50 " 19.56 " 10 - 60 " 27.23 " 10 - 70 " 37.86 " We realise that these figures will not be directly comparable with those that you have for previous small bore cars, and in addition they will compare very unfavourably with figures supplied by the "Motor" and the "Autocar", which are always optimistic. They are, however, accurate figures for the car in question, which has a 7-seater Limousine body. We think the best answer to customers wishing to know the performance of the small and large bore cars is to say that in the same car the large bore engine will provide 16% better acceleration, which is the amount the capacity has been altered. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} | ||