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 comparison for 8 and 12 cylinder 'Project Line 8' engines.
| Identifier | ExFiles\Box 108\2\ scan0105 | |
| Date | 17th June 1938 | |
| COPY FOR FILES. 17th. June 1938. PROJECT LINE 8 ENGINE. CYLS. | BORE. | STROKE. | STROKE/BORE | C.C. | R.A.C. 8 | 3 1/2 88.9 | 4 1/2 114.3 | 1.285 | 5660 | 39.2 12 | 3.06 77.7 | 3.93 100 | 1.285 | 5680 | 44.9 NOTE. For engines of same CC and same S/B RATIO, the RAC. HP. increases as the ³√ of the number of cylinders. | ||