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).
Dynamometer test results for an Essex Car, detailing horsepower and lbs at various engine revolutions.
| Identifier | ExFiles\Box 21\6\ Scan066 | |
| Date | 12th April 1922 | |
| Mr. Hives from GWH.{George W. Hancock - Head Chateauroux} X4217 12.4.22. DYNAMOMETER TESTS. ESSEX Car. Engine revs. HP. lbs. 500 6.197 62 750 11.62 77 1000 15.4 85 1250 20.6 85 1500 25.9 88 1750 30.1 93 2000 39.2 93 2250 40.2 85 2500 38.73 72 2750 39.3 67 | ||