The Lanz Bulldog HR2 is a farm tractor produced by Lanz from 1926 to 1931 in Mannheim, Baden-Württemberg, Germany. It features a 10.3L single-cylinder oil engine with liquid (hopper) cooling, producing 28 hp at 500 RPM. The tractor has a 4-speed gear transmission with 4 forward and reverse gears and a 2WD drive system.