Head to head · Four-Wheel Drive

CaseIH STX450 vs Challenger MT855B

CaseIH STX450 Tractor
CaseIHModel A

CaseIH STX450

Four-Wheel Drive

power
450 hp
displacement
912 ci
Cylinders
6
Forward gears
16
Full STX450 specs
Challenger MT855B Tractor
ChallengerModel B

Challenger MT855B

Articulated

power
465 hp
displacement
928 ci
Cylinders
6
Forward gears
16
Full MT855B specs
CaseIHCaseIH STX450
vs
ChallengerChallenger MT855B

How they compare

Headline specs vs. the whole Four-Wheel Drive

n = 71–162

Engine Power

▲ MT855B higher · +15 hp (+3%)
STX450450 hp
MT855B465 hp
Median Four-Wheel Drive Tractor375 hp

STX450 is in the 64th percentile; MT855B is in the 68th · 162 models

Engine Displacement

▲ MT855B higher · +16 ci (+2%)
STX450912 ci
MT855B928 ci
Median Four-Wheel Drive Tractor826 ci

STX450 is in the 78th percentile; MT855B is in the 84th · 152 models

Cylinders

= Effectively tied
STX4506
MT855B6
Median Four-Wheel Drive Tractor6

STX450 is in the 50th percentile; MT855B is in the 50th · 159 models

Forward Gears

= Effectively tied
STX45016
MT855B16
Median Four-Wheel Drive Tractor16

STX450 is in the 50th percentile; MT855B is in the 50th · 146 models

STX450 (A)MT855B (B)Median Four-Wheel Drive Tractor

Full comparison

Every spec, side by side

General Information

SpecCaseIH STX450Challenger MT855BDifference
ManufacturerCaseIHChallenger—
ModelSTX450MT855B—
CategoryFour-Wheel DriveArticulated—

Engine

SpecCaseIH STX450Challenger MT855BDifference
ManufacturerCumminsCaterpillar—
ModelQSX 15C15 ACERT—
Power Output450hp465hp▲ MT855B+15 hp · +3%
Rated RPM2,000RPM1,699RPM▲ STX450+301 RPM · +18%
Cylinders66Same
Displacement912ci928ci▲ MT855B+16 ci · +2%
Bore5.4in5.4inSame
Stroke6.7in6.8in▲ MT855B+0.1 in · +1%

Transmission

SpecCaseIH STX450Challenger MT855BDifference
TypeFull Power ShiftPowershift—

Dimensions & Weight

SpecCaseIH STX450Challenger MT855BDifference
Length318in266in▲ STX450+52 in · +20%
Width44in100in▲ MT855B+56 in · +127%
Height152in138in▲ STX450+14 in · +10%
Operating Weight39,325lb41,800lb▲ MT855B+2,475 lb · +6%

Hydraulics

SpecCaseIH STX450Challenger MT855BDifference
System TypePressure Flow Compensated (PFC)Closed Center PFC—
Steering TypeHydrostatic PowerNot recorded—

Power Take-off (PTO)

SpecCaseIH STX450Challenger MT855BDifference
Type1000 (1.75)Not recorded—

Hitch & Towing

SpecCaseIH STX450Challenger MT855BDifference
Hitch TypeIVN/IIIOptional—
Hitch CategoryNot recordedIII/IVN—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecCaseIH STX450Challenger MT855BDifference
Steering TypeHydrostatic PowerNot recorded—

Electrical

SpecCaseIH STX450Challenger MT855BDifference
Starter TypeElectric12 volt—

Category context

Both models against the field

Engine Power

median 375 hp
A · 64th percentile (450 hp)B · 68th percentile (465 hp)

Engine Displacement

median 826 ci
A · 78th percentile (912 ci)B · 84th percentile (928 ci)

Cylinders

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

Forward Gears

median 16
A · 50th percentile (16)B · 50th percentile (16)

Operating Weight

median 37,428 lb
A · 55th percentile (39,325 lb)B · 63rd percentile (41,800 lb)
A · STX450B · MT855BMedian Four-Wheel Drive Tractor
Full spec pageCaseIH STX450Full spec pageChallenger MT855B