Head to head · Four-Wheel Drive

Challenger MT645D vs Steiger Cougar III PTA-251

Image not recorded
ChallengerModel A

Challenger MT645D

Four-Wheel Drive

power
251 hp
displacement
514 ci
Cylinders
6
Forward gears
Not recorded
Full MT645D specs
ChallengerChallenger MT645D
vs
SteigerSteiger Cougar III PTA-251

How they compare

Headline specs vs. the whole Four-Wheel Drive

n = 152–162

Engine Power

= Effectively tied
MT645D251 hp
Cougar III PTA-251251 hp
Median Four-Wheel Drive Tractor375 hp

MT645D is in the 15th percentile; Cougar III PTA-251 is in the 16th · 162 models

Engine Displacement

▲ Cougar III PTA-251 higher · +341 ci (+66%)
MT645D514 ci
Cougar III PTA-251855 ci
Median Four-Wheel Drive Tractor826 ci

MT645D is in the 10th percentile; Cougar III PTA-251 is in the 61st · 152 models

Cylinders

= Effectively tied
MT645D6
Cougar III PTA-2516
Median Four-Wheel Drive Tractor6

MT645D is in the 50th percentile; Cougar III PTA-251 is in the 50th · 159 models

MT645D (A)Cougar III PTA-251 (B)Median Four-Wheel Drive Tractor

Full comparison

Every spec, side by side

General Information

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
ManufacturerChallengerSteiger—
ModelMT645DCougar III PTA-251—
CategoryFour-Wheel DriveFour-Wheel DriveSame

Engine

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
ManufacturerSisu DieselCummins—
ModelNot recordedNT 855-C-250—
Power Output251hp251hpSame
Rated RPM1,950RPMNot recorded—
Cylinders66Same
Displacement514ci855ci▲ Cougar III PTA-251+341 ci · +66%
Bore4.4in5.5in▲ Cougar III PTA-251+1.1 in · +25%
Stroke5.7in6in▲ Cougar III PTA-251+0.3 in · +5%

Transmission

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
TypeCVT (combination of mechanical and hydrostatic sections)Not recorded—

Dimensions & Weight

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
Length216inNot recorded—
Height141inNot recorded—
Operating Weight25,365lbNot recorded—

Hydraulics

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
System TypeClosed Center Load Sensing (CCLS)Not recorded—
Steering TypeHydrostatic powerNot recorded—

Power Take-off (PTO)

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
Speed 11,000rpmNot recorded—

Tires

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
Front Tire Size600/65R3418.4-38—
Rear Tire Size710/75R4218.4-38—

Hitch & Towing

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
Hitch TypeIIINot recorded—
Hitch CategoryIIINot recorded—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
Chassis Type4x44x4 4WD—
Drive Type4WD4WDSame
Steering TypeHydrostatic powerNot recorded—
Brake TypeMultiple wet disc hydraulically operated by two foot pedals that can be locked togetherNot recorded—

Electrical

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
Starter TypeElectricNot recorded—

Operator Station

SpecChallenger MT645DSteiger Cougar III PTA-251Difference
TypeCabNot recorded—

Category context

Both models against the field

Engine Power

median 375 hp
A · 15th percentile (251 hp)B · 16th percentile (251 hp)

Engine Displacement

median 826 ci
A · 10th percentile (514 ci)B · 61st percentile (855 ci)

Cylinders

median 6
A · 50th percentile (6)B · 50th percentile (6)
A · MT645DB · Cougar III PTA-251Median Four-Wheel Drive Tractor
Full spec pageChallenger MT645DFull spec pageSteiger Cougar III PTA-251