The Hart-Parr Little Devil 25-22 was produced from 1914 to 1916 by Hart-Parr in Charles City, Iowa. A total of 725 units were built. It features a Hart-Parr 5.5L 2-cylinder liquid-cooled kerosene engine with a displacement of 332.6 ci (5.5 L), rated at 600 RPM. The tractor has a 2-speed gear transmission with 2 forward and 1 reverse gears. It delivers 15 hp (11.2 kW) at the drawbar and 22 hp (16.4 kW) at the belt. The tractor is two-wheel drive and weighs 6647 lbs (3015 kg). Dimensions are 104 inches long, 95.5 inches wide, and 84 inches high. The fuel tank capacity is 23.75 gallons (89.9 L), and the coolant capacity is 53 quarts (50.2 L).