Standard TreadPerformance profile
Lanz Bulldog D7521
The Lanz Bulldog D7521 is a classic 2WD tractor with a 4x2 chassis. It features a 6-speed gear transmission, giving farmers good control over their work speed. This tractor is built for various farm tasks and is known for its simple, sturdy design. Under the hood, the Bulldog D7521 has a unique single-cylinder diesel engine made by Lanz. This liquid-cooled engine is naturally aspirated and has a displacement of 286.8 cubic inches. It's a powerful machine for its size, producing 24.5 horsepower at 850 RPM. The engine's large bore of 6.693 inches and long stroke of 8.268 inches help it deliver strong, steady power for tough farm work.
ManufacturerLanzPower24.5 hpEngine1-cylTransGear
Image not recorded
Quick specs
- Category
- Standard Tread
- Engine Power Output
- 25hp
- Transmission
- Gear
At a glance
How the Bulldog D7521 compares
vs. Standard Tread medianDistribution
Engine Power (hp)
Across all Standard Tread tractors
24.5 hp · 19th
This model
12
Median 45 hp
102
This modelStandard Tread tractorsMediann = 121
The Bulldog D7521 ranks at the 19th percentile for engine power among recorded standard tread tractors.
Overview
About the Lanz Bulldog D7521
The Lanz Bulldog D7521 is a classic 2WD tractor with a 4x2 chassis. It features a 6-speed gear transmission, giving farmers good control over their work speed. This tractor is built for various farm tasks and is known for its simple, sturdy design. Under the hood, the Bulldog D7521 has a unique single-cylinder diesel engine made by Lanz. This liquid-cooled engine is naturally aspirated and has a displacement of 286.8 cubic inches. It's a powerful machine for its size, producing 24.5 horsepower at 850 RPM. The engine's large bore of 6.693 inches and long stroke of 8.268 inches help it deliver strong, steady power for tough farm work.
Full specifications
Every recorded spec
General
| Manufacturer | Lanz |
|---|---|
| Model | Bulldog D7521 |
| Category | Standard Tread tractor |
| Type | 4x2 |
Engine
| Make | Lanz |
|---|---|
| Power | 24.5hp |
| Cylinders | 1 |
| Displacement | 286.8ci |
| Bore | 6.69in |
| Stroke | 8.27in |
Transmission
| Type | Gear |
|---|---|
| Forward gears | 6 |
Chassis & drive
| Chassis | 4x2 |
|---|---|
| Drive | 2WD |
Head to head
Bulldog D7521 vs. Standard Tread median
How the Lanz Bulldog D7521 compares to other Standard Tread tractors
| Spec | This model | Standard Tread median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 24.5 hp | 45 hp | -46% | 19th |
| Engine Displacement | 287 ci | 382 ci | -25% | 33rd |
| Cylinders | 1 | 4 | -75% | 7th |
| Forward Gears | 6 | 4 | +50% | 79th |
Medians and percentiles are computed from the standard tread tractors in our database with a recorded value for each spec (sample sizes 121–367 models).
Compare to tractors with similar specs
Commonly compared Lanz tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Lanz Bulldog D7500 | 24.5 hp | 4,850 lb | — | Compare → |
| Lanz Bulldog D7506 | 24.5 hp | 4,982 lb | — | Compare → |
| Lanz Bulldog D7507 | 24.5 hp | — | — | Compare → |
| Lanz Bulldog D7511 | 24.5 hp | — | — | Compare → |
| Lanz Bulldog D7531 | 24.5 hp | — | — | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Bobcat CT1025 | 24.5 hp | 1,488 lb | — | Compare → |
| AGCO ST25 | 24.3 hp | 1,588 lb | — | Compare → |
| Ag King AK2840 | 24 hp | 2,900 lb | — | Compare → |
| Allis Chalmers 5020 | 25 hp | 2,060 lb | 1977–1985 | Compare → |
| Allis Chalmers FD3 | 25 hp | 3,150 lb | — | Compare → |
Explore
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FAQ
Common questions
What is the engine power output of the Lanz Bulldog D7521?
Rated engine output for the Lanz Bulldog D7521 is 24.5 hp, delivered by a 1-cylinder engine. The engine displaces 286.8 ci.
Which transmission does the Lanz Bulldog D7521 use?
The Lanz Bulldog D7521 is equipped with a Gear transmission with 6 forward gears.
How do I maintain a Lanz Bulldog D7521?
Routine service for the Lanz Bulldog D7521 covers engine oil and filter changes, hydraulic and coolant level checks, air filter cleaning, and scheduled inspections. Refer to the manufacturer's maintenance schedule for exact intervals.