Performance graph comparing horsepower, acceleration, and velocity for a Standard Car versus a 'Vanvooren' model.
| Identifier | ExFiles\Box 161\1\ scan0065 | |
| Date | 2nd December 1937 guessed | |
| FT. SEC.^2 H.P. ROAD WHEEL H.P. STANDARD CAR IN OVERDRIVE ACCEL. VANVOOREN ACCEL STD. CAR VEL. TIME STD. CAR VEL. TIME VANVOOREN Y-Axis: 90, 80, 70, 60, 50, 40, 30, 20, 10, 0 Y-Axis 2: 8, 7, 6, 5, 4, 3, 2, 1 X-Axis: 0, 10, 20, 30, 40, 50, 60, 70, 80 | ||
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).