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).
Table of vehicle acceleration times for various speed ranges.
| Identifier | ExFiles\Box 109\4\ scan0115 | |
| Date | 3rd July 1939 | |
| -5- Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}5/JH.3.7.39. Speeds. 10 - 30. 10 - 40. 10 - 50. 10 - 60. 10 - 70. 10 - 80. Time. 7.8 10.80 14.70 18.40 24.60 33.20 secs. Gear ratio 9 x 37. 85 m.p.h. at 4000 r.p.m. Road wheel H.P. curve as per Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}1/JH.26.6.39. Rm{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||