The Lanz HR4 Bulldog is a tractor model with a rated power output of 28 hp, positioning it at the lower end of its class in terms of power. The HR4 Bulldog was manufactured between 1928 and 1929. It features a 1-cylinder liquid-cooled engine and two-wheel drive, paired with a 3-speed gearbox. The tractor is suitable for operations on areas of up to 200 acres.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
28 hp
Catalogue coverage
Variants represented
2
Richest spec table
25 rows
Recorded power
28 hp
Transmissions
3-speed gear
Production years
1928-1929
Verified variants
0
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Overview
ManufacturerLanzReference
Standard-tread tractorReference
Built in Mannheim, Baden-Württemberg, GermanyReference
Total built180Reference
Two-wheel driveReference
Manual steeringReference
Open operator station.Reference
Engine
Lanz 10.3L 1-cyl oilReference
Engine20.9 kWReference
Drawbar (claimed)16.4 kWReference
LanzReference
oilReference
1-cylinderReference
liquid-cooledReference
Displacement10.3 LReference
Bore/Stroke225 x 260 mmReference
Power20.9 kWReference
Cooling systemthermosyphonReference
Rated RPM500Reference
Transmission
3-speed gearReference
TypegearReference
Gears3 forward and 1 reverseReference
HR4 Serial Numbers
192875001Reference
Final75180Reference
FAQ: How to read a serial number table.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
