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).
Specification table comparing different engine makes such as Penta and Scripps.
| Identifier | ExFiles\Box 133\3\ scan0101 | |
| Date | 23th January 1940 guessed | |
| -2- MAKE | B.H.P. | REVS. | BORE & STROKE. | WEIGHT. | PRICE. PENTA | 30-75 | 1000-2700 | 6cyl. 3.312 x 4.312 | 860 | SCRIPPS. | 30-96 | 1000-3600 | 8cyl.(v)3.062 x 3.75 | 600 | £145 do. | 43-120 | 1000-3000 | 6cyl. 3.75 x 5 | 840 | Weights include reverse gear. Starter motor not included. Reduction gears are usually an extra. Jnr.{Charles L. Jenner} | ||