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).
Comparative table of specifications for various manufacturers' engines.
| Identifier | ExFiles\Box 133\3\ scan0087 | |
| Date | 15th September 1939 guessed | |
| | | Dry wt. complete lb. | Rated HP at RPM. | Wt. per H.P. lb. | Displacement. ccs. | Fuel consumption lb/BHP/hr. | Speed Range R.P.M. | B.M.E.P. at RPM. lbs/sq.in.at RPM. | Max. Torque at RPM. | |---|---|---|---|---|---|---|---|---| | Leyland 6-cyl. | 1288 | 98 at 1900 | 13.2 | 8600 | .39 | 400 - 1900 | 89 at 1050 | 310 lb.ft at 1050 | | A.E.C. 6-cyl. | 1453 | 90 at 1800 | 16.2 | 8850 | .385 | 350 - 1800 | 90 at 1000 | 320 lb.ft at 1000 | | *General Motors 3-cyl. | 1450 | 83 at 2000 | 17.5 | 3488 | .45 | 400 - 2000 | 94 at 900 | 262 lb.ft at 900 | | *General Motors 6-cyl. | 2000 | 165 at 2000 | 12.14 | 6976 | .45 | 400 - 2000 | 94 at 900 | 526 lb.ft at 900 | | Austro-Saurer 6-cyl. | 1170 | 105 at 2000 | 11.2 | 7983 | .375 | 400 - 2000 | 101 at 1200 | 320 lb.ft. at 1200 | | Mercedes Benz 6-cyl. | 2178 | 150 at 1700 | 14.5 | 12517 | .44 | 400 - 1700 | 85 | 477 lb.ft. at 1200 | | Mercedes Benz 6-cyl. | 1474 | 100 at 2000 | 14.74 | 7273 | .44 | 400 - 2000 | 85 | 253 lb.ft. at 1400 | | *General Motors. 4-cyl. | 1650 | 110 at 2000 | 15.0 | 4651 | .45 | 400 - 2000 | 94 at 900 | 352 lb.ft at 900 | | ||