Introduction
Lanz HR4 Standard-Tread Tractor
The Lanz HR4 is a vintage agricultural tractor produced between 1928 and 1929 in Mannheim, Germany. As a standard-tread machine with a limited production run of 180 units, it represents a significant example of early 20th-century European agricultural engineering.
Engine and Cooling System
The tractor is powered by a large 10.3-liter, 1-cylinder engine, producing 28 horsepower (20.9 kW) at a rated speed of 500 RPM. The engine features a bore and stroke of 225 x 260 mm. Cooling is managed through a thermosyphon liquid-cooling system, which relies on natural convection to maintain operating temperatures, reflecting the mechanical simplicity of the period.
Transmission and Drivetrain
The HR4 utilizes a gear-type transmission providing 3 forward speeds and 1 reverse gear. Power is delivered to the ground via a two-wheel-drive configuration, designed for standard agricultural tasks of the late 1920s.
Operator Station and Handling
The machine is equipped with manual steering and features an open operator station, typical of tractors from this era, offering direct access to the controls and high visibility of the surroundings.
Conclusion
With its robust 1-cylinder engine and limited production numbers, the Lanz HR4 is primarily recognized today as a collector's item, serving as a testament to the industrial heritage of the Lanz brand in Mannheim during the interwar period.
Production Information of Lanz, HR4
- Standard-tread tractor
- Built in Mannheim, Baden-Württemberg, Germany
| Manufacturer | Lanz |
|---|---|
| Total built | 180 |
Engine Specifications of Lanz, HR4
- Lanz
- Liquid-cooled
- Oil
- 1-cylinder
| Power | 28 hp [20.9 kW] |
|---|---|
| Displacement | 628.5 ci [10.3 L] |
| Cooling system | Thermosyphon |
| Bore/Stroke | 8.858x10.24 inches [225 x 260 mm] |
| Rated RPM | 500 |
Transmission Information of Lanz, HR4
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 3 forward and 1 reverse |
Mechanical Specs of Lanz, HR4
- Two-wheel drive
- Manual steering
- Open operator station.
Power Information of Lanz, HR4
| Engine | 28 hp [20.9 kW] |
|---|---|
| Drawbar (claimed) | 22 hp [16.4 kW] |
Where it sits
With 28 HP, the Lanz HR4 sits between 300 (27 HP) and HR5 (30 HP) in Lanz's range. Its power puts it in the 36th percentile of 1920s models in our database (181 machines).
Frequently asked questions
How much horsepower does the Lanz HR4 have?
The Lanz HR4 delivers 28 HP.
What years was the Lanz HR4 produced?
The Lanz HR4 was produced in 1928-1929.
What engine does the Lanz HR4 have?
The Lanz HR4 is powered by a 1-cylinder engine.
What transmission does the Lanz HR4 use?
The Lanz HR4 uses a Gear transmission.
Is the Lanz HR4 4WD?
The Lanz HR4 is available in 2WD.