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 for small and large four-cylinder engines.
| Identifier | ExFiles\Box 144\2\ scan0013 | |
| Date | 24th January 1941 | |
| Cont'd.{John DeLooze - Company Secretary} - 8 - Rm.{William Robotham - Chief Engineer}1/AL.24.1.41. SMALL FOURS, FITTED IN SILVER RIPPLE. Table Headers: [Engine], Cu: Ins., Litres., R.A.C.h.p., Tax @ £1.5.0. Row 1: 4-cyl: (57 x 100) 2.244x3.937, 62, 1.021, 8, £10.0.0. Row 2: 4-cyl: (63.5 x 100) 2.5 x 3.937, 77, 1.267, 10, £12.10.0. Row 3: 4-cyl: (69.5 x 100) 2.735 x 3.937, 92, 1.515, 12, £15.0.0. LARGE FOURS, FITTED IN ROLLS ROYCE. Row 4: 4-cyl: (75) 2.952 x 4.5, 123.4, 2.022, 13.95, £17.10.0. Row 5: 4-cyl: 3.25 x 4.5, 149, 2.437, 16.9, £21.5.0. Row 6: 4-cyl: 3.5 x 4.5, 173, 2.838, 19.6, £25.0.0. Row 7: 4-cyl: 3.75 x 4.5, 198, 3.256, 22.5, £28.15.0. It would be uneconomical to have two entirely different basic four cylinder engines in production, were not the large one made from pieces common to the senior range of engines, to a great extent. - Continued - | ||