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).
Comparison table of performance data for four different engines.
| Identifier | ExFiles\Box 124\3\ scan0435 | |
| Date | 25th March 1937 guessed | |
| 1049 | | PACARD | S. 3 | 37 - 60 BUICK | C 15 |---|---|---|---|---| | Bore | 3 3/16 | 3 3/8 | 3 7/16 | 3 1/4 | Stroke | 4 1/4 | 4 1/4 | 4 5/16 | 4 7/8 | DISP. | 236 | 228 | 320.2 | 323.5 | B.H.P. | 93.36 @ 3200 | 93 @ 3600 | 124.4 @ 3400 | 125 @ 3200 | TORQUE | 192.9 @ 1200 | 168 @ 1200 | 254.5 @ 2000 | 250 @ 1600 | B.M.E.P. | 122.9 @ 1200 | 111 @ 1200 | 119.9 @ 2000 | 116.5 @ 1600 | B.H.P. @ 4,000 | 86.09 | 91.0 | 116.7 | 110 | F.H.P. | 48.00 | 42.5 | 55.08 | 53 | | | | 3,600 | 3,600 | I.H.P. | 134.09 | 133.5 | 123.4 | 121.75 | | | | 3,600 | 3,600 | MECH. EFF @ 4000 | 64.2 | 68.2 | 69.1 | 65.7 | COMP. RATIO | 6.65 | 6.5 | 5.73 | 6.29 | B.H.P. 3600 | | | 123.4 | 121.75 CORRECTED TO 29.92 & 60° F.{Mr Friese} | ||