Lanz Bulldog HR4

The Lanz Bulldog HR4 is a vintage tractor, primarily recognized for its robust design and distinctive single-cylinder engine. With a substantial 628.5 cubic inch displacement, the engine generates 28 horsepower. It operates at a notably low rated RPM of 500, suggesting significant torque ideal for heavy pulling tasks. The Bulldog HR4 features a gear-driven transmission with a simple 3-speed setup for both forward and reverse travel. This model uses a thermosyphon cooling system—a passive method relying on natural convection to circulate coolant—paired with an oil-based fuel system, which is a characteristic feature of older tractors. As a 2WD chassis tractor, it may have limitations in tough terrain but would excel in flat-field utility work. Due to its age and unique construction, the Bulldog HR4 caters to enthusiasts of classic and historical farm machinery and is a piece of agricultural history.