The Lanz Bulldog D8500 is a farm tractor produced by Lanz from 1935 to 1955 in Mannheim, Baden-Württemberg, Germany. It belongs to the D85 Series and features a 10.3L single-cylinder liquid-cooled diesel engine producing 34.3 hp (25.6 kW) at 540 RPM. The tractor has a 3-speed gear transmission with 3 forward and 1 reverse gears and a 2WD drive. Variants include models with 3-speed and 6-speed transmissions, as well as high-speed road models and combination models for road and field use.