Four-Wheel DrivePerformance profile
Challenger MT645D
The Challenger MT645D is a powerful 4WD tractor built for serious farm work. It has a strong Sisu Diesel engine with 6 cylinders and 250.8 horsepower. This engine is turbocharged and cooled by liquid, which helps it run well even in tough conditions. The tractor uses No. 2 Diesel fuel. One special thing about the MT645D is its CVT transmission. This means it has infinite forward and reverse gears, making it easy to find the right speed for any job. The tractor is big, measuring 215.7 inches long and 141 inches tall. It's also heavy, weighing 25,365 pounds. The MT645D has large tires, with 600/65R34 in front and 710/75R42 in the back. These help it move well in different types of soil. The tractor has a comfortable cab for the driver and uses hydrostatic power steering. It has a strong hydraulic system and a rear hitch for attaching tools. The PTO can run at 1000 rpm, which is good for powering many farm implements. Safety features include wet disc brakes that can be controlled by foot pedals. Overall, the Challenger MT645D is a versatile and robust tractor suitable for large-scale farming operations.
ManufacturerChallengerPower250.8 hpEngine6-cylTransCVT (combination of mechanical and hydrostatic sections)
Image not recorded
Quick specs
- Category
- Four-Wheel Drive
- Engine Power Output
- 251hp
- Operating Weight
- 25,365 lb
- Transmission
- CVT (combination of mechanical and hydrostatic sections)
At a glance
How the MT645D compares
vs. Four-Wheel Drive medianDistribution
Engine Power (hp)
Across all Four-Wheel Drive tractors
250.8 hp · 15th
This model
84
Median 375 hp
549
This modelFour-Wheel Drive tractorsMediann = 162
The MT645D ranks at the 15th percentile for engine power among recorded four-wheel drive tractors.
Overview
About the Challenger MT645D
The Challenger MT645D is a powerful 4WD tractor built for serious farm work. It has a strong Sisu Diesel engine with 6 cylinders and 250.8 horsepower. This engine is turbocharged and cooled by liquid, which helps it run well even in tough conditions. The tractor uses No. 2 Diesel fuel. One special thing about the MT645D is its CVT transmission. This means it has infinite forward and reverse gears, making it easy to find the right speed for any job. The tractor is big, measuring 215.7 inches long and 141 inches tall. It's also heavy, weighing 25,365 pounds. The MT645D has large tires, with 600/65R34 in front and 710/75R42 in the back. These help it move well in different types of soil. The tractor has a comfortable cab for the driver and uses hydrostatic power steering. It has a strong hydraulic system and a rear hitch for attaching tools. The PTO can run at 1000 rpm, which is good for powering many farm implements. Safety features include wet disc brakes that can be controlled by foot pedals. Overall, the Challenger MT645D is a versatile and robust tractor suitable for large-scale farming operations.
Full specifications
Every recorded spec
General
| Manufacturer | Challenger |
|---|---|
| Model | MT645D |
| Category | Four-Wheel Drive tractor |
| Type | 4x4 |
| Operating weight | 25,365lb |
Engine
| Make | Sisu Diesel |
|---|---|
| Power | 250.8hp |
| Cylinders | 6 |
| Displacement | 513.8ci |
| Bore | 4.37in |
| Stroke | 5.71in |
Transmission
| Type | CVT (combination of mechanical and hydrostatic sections) |
|---|
Chassis & drive
| Chassis | 4x4 |
|---|---|
| Drive | 4WD |
| Steering | Hydrostatic power |
| Brakes | Multiple wet disc hydraulically operated by two foot pedals that can be locked together |
| Cab | Cab |
Hydraulics
| Type | Closed Center Load Sensing (CCLS) |
|---|
Power take-off
| PTO speed | 1,000rpm |
|---|
Dimensions
| Length | 215.7in |
|---|---|
| Height | 141in |
| Operating weight | 25,365lb |
Tires
| Front | 600/65R34 |
|---|---|
| Rear | 710/75R42 |
Head to head
MT645D vs. Four-Wheel Drive median
How the Challenger MT645D compares to other Four-Wheel Drive tractors
| Spec | This model | Four-Wheel Drive median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 251 hp | 375 hp | -33% | 15th |
| Engine Displacement | 514 ci | 826 ci | -38% | 10th |
| Cylinders | 6 | 6 | at median | 50th |
| Operating Weight | 25,365 lb | 37,428 lb | -32% | 22nd |
| Length | 216 in | 275 in | -22% | 5th |
| Height | 141 in | 143 in | -1% | 47th |
Medians and percentiles are computed from the four-wheel drive tractors in our database with a recorded value for each spec (sample sizes 98–162 models).
Compare to tractors with similar specs
Commonly compared Challenger tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Challenger MT745 | 255 hp | 28,195 lb | — | Compare → |
| Challenger MT755D | 317.51 hp | 31,520 lb | — | Compare → |
| Challenger MT775E | 374.43 hp | 33,730 lb | — | Compare → |
| Challenger MT835C | 402.32 hp | 50,000 lb | — | Compare → |
| Challenger 1042 | 410.1 hp | 31,615 lb | — | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Big Bud HN250 | 250 hp | 34,000 lb | — | Compare → |
| AGCO DT205B | 242.3 hp | 25,840 lb | 2009–2010 | Compare → |
| AGCO DT220A | 260 hp | 19,951 lb | 2005–2008 | Compare → |
| CaseIH 4694 | 261 hp | 22,310 lb | — | Compare → |
| CaseIH 9330 | 240 hp | 23,650 lb | 1996–1999 | Compare → |
Explore
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FAQ
Common questions
How much horsepower does the Challenger MT645D have?
The Challenger MT645D produces 250.8 hp from its 6-cylinder engine. Engine displacement is 513.8 ci.
What hydraulics does the Challenger MT645D have?
The Challenger MT645D uses a Closed Center Load Sensing (CCLS) hydraulic system.
What are the factory tire sizes for the Challenger MT645D?
The Challenger MT645D comes with 600/65R34 front tires and 710/75R42 rear tires.
What three-point hitch category does the Challenger MT645D use?
The Challenger MT645D has a Category III three-point hitch.
How much does the Challenger MT645D weigh?
The Challenger MT645D weighs about 25,365 lb in operating condition.
What transmission is in the Challenger MT645D?
Transmission on the Challenger MT645D is CVT (combination of mechanical and hydrostatic sections).
What maintenance does the Challenger MT645D require?
Like any tractor, the Challenger MT645D needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.