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 various car models, detailing engine bore, stroke, capacity, and chassis dimensions.
| Identifier | ExFiles\Box 3\4\ 04-page012 | |
| Date | 16th March 1931 | |
| Copy. WGF. a.{Mr Adams} C. c. Ex. c. Hy.{Tom Haldenby - Plant Engineer} BTM/030.16.31. As requested we give below the information required in regard to the various RR. cars :- | TYPE. | BORE. | STROKE. | TOTAL CYLINDER CAPACITY. | R.A.C. RATING. | WHEEL BASE. | TRACK. | |--------------|---------|---------|------------------------------------------------|----------------|-------------|--------| | Phantom II. | 4.250" | 5.500" | 468 cu.ins. 7668 c.c. | 43.3 | 12'6" | 5'0" | | 20/25 HP. | 3.250" | 4.500" | 224 cu.ins. 3670 c.c. | 25.3 | 11'0" | 4'8" | | Japan I. | 3.250" | 4.500" | 224 cu.ins. 3670 c.c. | 25.3 | 11'0" | 4'8" | | Japan III. | 3.600" | 5.000" | <del>293</del> 264 cu.ins. <del>4816</del> 4404 c.c. | 27.7 | 11'0" | 4'10" | | Peregrine | 2.725" | 4.175" | 146 cu.ins. 2364 c.c. | 17.7 | 10'0" | 4'8" | | B.T | 2.725" | 4.175" | 146 cu.ins. 2364 c.c. | 17.7 | 10'0" | 4'8" | Ex. | ||