The Lanz Bulldog D1506 is a farm tractor produced by Lanz from 1938 to 1944 in Mannheim, Baden-Württemberg, Germany. It features a 10.3L single-cylinder liquid-cooled diesel engine producing 53.9 hp (40.2 kW) at 750 RPM. The tractor has a 6-speed transmission and a 2WD drive with an open operator station. It was available in variants including the D1500 with a 3-speed transmission and the D1506 with a 6-speed transmission.