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).
Graph of road speed (MPH) versus engine speed (RPM) for a 3 1/2 Litre Saloon, showing performance in different gears.
| Identifier | ExFiles\Box 126\5\ scan0046 | |
| Date | 22th March 1935 | |
| 3 1/2 LITRE SALOON AXLE RATIO 4.25:1 TYRES 5.50 x 18 MPH 100 80 60 40 20 0 RPM. 1,000 2,000 3,000 4,000 5,000 TOP THIRD SECOND FIRST & REV E.D. 22.3.35 | ||