Head to head · Four-Wheel Drive

Challenger MT645D vs Challenger MT745

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ChallengerModel A

Challenger MT645D

Four-Wheel Drive

power
251 hp
displacement
514 ci
Cylinders
6
Forward gears
Not recorded
Full MT645D specs
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ChallengerModel B

Challenger MT745

Four-Wheel Drive

power
255 hp
displacement
537 ci
Cylinders
6
Forward gears
30
Full MT745 specs
ChallengerChallenger MT645D
vs
ChallengerChallenger MT745

How they compare

Headline specs vs. the whole Four-Wheel Drive

n = 132–162

Engine Power

▲ MT745 higher · +4 hp (+2%)
MT645D251 hp
MT745255 hp
Median Four-Wheel Drive Tractor375 hp

MT645D is in the 15th percentile; MT745 is in the 17th · 162 models

Engine Displacement

▲ MT745 higher · +23 ci (+4%)
MT645D514 ci
MT745537 ci
Median Four-Wheel Drive Tractor826 ci

MT645D is in the 10th percentile; MT745 is in the 13th · 152 models

Cylinders

= Effectively tied
MT645D6
MT7456
Median Four-Wheel Drive Tractor6

MT645D is in the 50th percentile; MT745 is in the 50th · 159 models

Operating Weight

▲ MT745 higher · +2,830 lb (+11%)
MT645D25,365 lb
MT74528,195 lb
Median Four-Wheel Drive Tractor37,428 lb

MT645D is in the 22nd percentile; MT745 is in the 26th · 132 models

MT645D (A)MT745 (B)Median Four-Wheel Drive Tractor

Full comparison

Every spec, side by side

General Information

SpecChallenger MT645DChallenger MT745Difference
ManufacturerChallengerChallengerSame
ModelMT645DMT745—
CategoryFour-Wheel DriveFour-Wheel DriveSame

Engine

SpecChallenger MT645DChallenger MT745Difference
ManufacturerSisu DieselCaterpillar—
Power Output251hp255hp▲ MT745+4 hp · +2%
Rated RPM1,950RPM2,100RPM▲ MT745+150 RPM · +8%
Cylinders66Same
Displacement514ci537ci▲ MT745+23 ci · +4%
Bore4.4in4.4inSame
Stroke5.7in5.9in▲ MT745+0.2 in · +4%

Transmission

SpecChallenger MT645DChallenger MT745Difference
TypeCVT (combination of mechanical and hydrostatic sections)Full Power Shift / Creeper—

Dimensions & Weight

SpecChallenger MT645DChallenger MT745Difference
Length216inNot recorded—
Height141inNot recorded—
Operating Weight25,365lb28,195lb▲ MT745+2,830 lb · +11%

Hydraulics

SpecChallenger MT645DChallenger MT745Difference
System TypeClosed Center Load Sensing (CCLS)Not recorded—
Steering TypeHydrostatic powerElectro-hydraulic—

Power Take-off (PTO)

SpecChallenger MT645DChallenger MT745Difference
Speed 11,000rpmNot recorded—

Tires

SpecChallenger MT645DChallenger MT745Difference
Front Tire Size600/65R34Not recorded—
Rear Tire Size710/75R42Not recorded—

Hitch & Towing

SpecChallenger MT645DChallenger MT745Difference
Hitch TypeIIIThree-Point Hitch—
Hitch CategoryIIIIIISame
Hitch PositionRearRearSame

Chassis & Drive

SpecChallenger MT645DChallenger MT745Difference
Chassis Type4x4Not recorded—
Drive Type4WDNot recorded—
Steering TypeHydrostatic powerElectro-hydraulic—
Brake TypeMultiple wet disc hydraulically operated by two foot pedals that can be locked togetherHydraulic wet disc—

Electrical

SpecChallenger MT645DChallenger MT745Difference
Starter TypeElectricElectricSame

Operator Station

SpecChallenger MT645DChallenger MT745Difference
TypeCabNot recorded—

Category context

Both models against the field

Engine Power

median 375 hp
A · 15th percentile (251 hp)B · 17th percentile (255 hp)

Engine Displacement

median 826 ci
A · 10th percentile (514 ci)B · 13th percentile (537 ci)

Cylinders

median 6
A · 50th percentile (6)B · 50th percentile (6)

Operating Weight

median 37,428 lb
A · 22nd percentile (25,365 lb)B · 26th percentile (28,195 lb)
A · MT645DB · MT745Median Four-Wheel Drive Tractor
Full spec pageChallenger MT645DFull spec pageChallenger MT745