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).
Performance comparison of a Standard B.2. Saloon and a Vanvooren model, focusing on acceleration data.
| Identifier | ExFiles\Box 161\1\ scan0061 | |
| Date | 1st December 1937 guessed | |
| -2- Standard B.2. Saloon. MPH. SEC. 10 to 60 18.05 10 to 70 24.83 10 to 80 39.43 20 to 80 36.31 Vanvooren. MPH. SEC. 10 to 60 16.98 10 to 70 21.62 10 to 80 27.58 20 to 80 24.40 % improvement over standard Saloon. 5.95% 14.15% 30.00% 32.90% Percentage improvement in acceleration assuming the two cars have identical weights i.e. 33 cwts. Standard B.2. Saloon. MPH. ACCELERATION. 40 4.17 ft.sec. 50 3.56 " 60 2.72 " 70 1.61 " Vanvooren. ACCELERATION. 4.63 4.22 3.63 2.88 PERCENTAGE GAIN. 11.0% 18.5% 33.5% 79.0% Equivalent of increased acceleration in weight saved. 40 MPH. - 3.63 cwts. 50 " - 6.10 " 60 " - 11.10 " 70 " - 26.10 " | ||