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).
List of car manufacturers categorized by horsepower over 25 for the year 1937.
| Identifier | ExFiles\Box 128\1\ scan0295 | |
| Date | 3rd December 1937 | |
| CARS OF HORSE POWER OVER 25. 1937 H.P. 25 Morris, Vauxhall, Wolseley. 26 Alvis, Bentley, Bugatti, Daimler, Dodge, Graham, Lammas-Graham, Packard, Rolls-Royce, Studebaker. 27 Chevrolet, Humber, Renault. 28 Chrysler, Hotchkiss, Lancia, Nash. 29 Hudson, Railton-Hudson, Oldsmobile, Pontiac. 30 Siddeley Special, Auburn, Bentley, Hispano-Suiza, Lagonda, Rolls-Royce, Studebaker, Ford. 31 Buick. 32 Alvis, Daimler, Nash, Sunbeam. 33 Packard 34 Chrysler, Oldsmobile, Packard, Pontiac. 35 36 Renault. 37 38 Buick, Horch. 39 Mercedes-Benz. 40 Cord, Cadillac. 41 42 Lagonda. 43 44 45 46 47 48 49 50 51 Rolls-Royce. 52 53 54 55 56 57 | ||