Head to head · Row Crop

Challenger MT555B MFWD vs Challenger MT645

Challenger MT555B MFWD Tractor
ChallengerModel A

Challenger MT555B MFWD

Row Crop

power
130 hp
displacement
403 ci
Cylinders
6
Forward gears
Not recorded
Full MT555B MFWD specs
Challenger MT645 Tractor
ChallengerModel B

Challenger MT645

Row Crop

power
Not recorded
displacement
449 ci
Cylinders
6
Forward gears
18
Full MT645 specs
ChallengerChallenger MT555B MFWD
vs
ChallengerChallenger MT645

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Displacement

▲ MT645 higher · +46 ci (+11%)
MT555B MFWD403 ci
MT645449 ci
Median Row Crop Tractor391 ci

MT555B MFWD is in the 56th percentile; MT645 is in the 77th · 1,409 models

Cylinders

= Effectively tied
MT555B MFWD6
MT6456
Median Row Crop Tractor6

MT555B MFWD is in the 50th percentile; MT645 is in the 50th · 1,417 models

Operating Weight

▲ MT645 higher · +4,020 lb (+27%)
MT555B MFWD15,000 lb
MT64519,020 lb
Median Row Crop Tractor12,307 lb

MT555B MFWD is in the 66th percentile; MT645 is in the 81st · 1,350 models

Length

▲ MT645 higher · +12 in (+6%)
MT555B MFWD191 in
MT645203 in
Median Row Crop Tractor180 in

MT555B MFWD is in the 63rd percentile; MT645 is in the 78th · 1,157 models

MT555B MFWD (A)MT645 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecChallenger MT555B MFWDChallenger MT645Difference
ManufacturerChallengerChallengerSame
ModelMT555B MFWDMT645—
CategoryRow CropRow CropSame

Engine

SpecChallenger MT555B MFWDChallenger MT645Difference
ManufacturerNot recordedSisu/Valmet Diesel—
ModelC6.6 ACERTNot recorded—
Power Output130hpNot recorded—
Rated RPM2,200RPM2,200RPMSame
Cylinders66Same
Displacement403ci449ci▲ MT645+46 ci · +11%
BoreNot recorded4.3in—
StrokeNot recorded5.3in—

Transmission

SpecChallenger MT555B MFWDChallenger MT645Difference
TypeAuto PowerSelective gear fixed ratio with full range operator controlled powershift—

Dimensions & Weight

SpecChallenger MT555B MFWDChallenger MT645Difference
Length191in203in▲ MT645+12 in · +6%
Width81.6in98.2in▲ MT645+16.6 in · +20%
Height124in121in▲ MT555B MFWD+3 in · +2%
Operating Weight15,000lb19,020lb▲ MT645+4,020 lb · +27%

Hydraulics

SpecChallenger MT555B MFWDChallenger MT645Difference
System TypeNot recordedClosed Center Pressure Flow Compensated (PFC)—
Steering TypeNot recordedPower Steering (Hydrostatic)—

Hitch & Towing

SpecChallenger MT555B MFWDChallenger MT645Difference
Hitch TypeThree-PointNot recorded—
Hitch CategoryNot recordedIII—
Hitch PositionRearRearSame
Hitch Capacity14,283lbNot recorded—

Chassis & Drive

SpecChallenger MT555B MFWDChallenger MT645Difference
Chassis TypeNot recorded4x4 MFWD 4WD—
Drive TypeMFWDNot recorded—
Steering TypeNot recordedPower Steering (Hydrostatic)—

Electrical

SpecChallenger MT555B MFWDChallenger MT645Difference
Starter TypeNot recordedElectric, 12 Volts—

Capacities

SpecChallenger MT555B MFWDChallenger MT645Difference
Coolant6.8galNot recorded—

Operator Station

SpecChallenger MT555B MFWDChallenger MT645Difference
TypeNot recordedCab—

Category context

Both models against the field

Engine Displacement

median 391 ci
A · 56th percentile (403 ci)B · 77th percentile (449 ci)

Cylinders

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

Operating Weight

median 12,307 lb
A · 66th percentile (15,000 lb)B · 81st percentile (19,020 lb)

Length

median 180 in
A · 63rd percentile (191 in)B · 78th percentile (203 in)

Width

median 91.2 in
A · 29th percentile (81.6 in)B · 79th percentile (98.2 in)
A · MT555B MFWDB · MT645Median Row Crop Tractor
Full spec pageChallenger MT555B MFWDFull spec pageChallenger MT645