Head to head · Utility

Challenger MT555B vs Challenger MT645C

Image not recorded
ChallengerModel A

Challenger MT555B

Utility

power
171 hp
displacement
366 ci
Cylinders
6
Forward gears
24
Full MT555B specs
Image not recorded
ChallengerModel B

Challenger MT645C

Utility

power
242 hp
displacement
513 ci
Cylinders
6
Forward gears
Not recorded
Full MT645C specs
ChallengerChallenger MT555B
vs
ChallengerChallenger MT645C

How they compare

Headline specs vs. the whole Utility

n = 1,083–5,720

Engine Power

▲ MT645C higher · +71 hp (+42%)
MT555B171 hp
MT645C242 hp
Median Utility Tractor55 hp

MT555B is in the 94th percentile; MT645C is in the 96th · 5,383 models

Engine Displacement

▲ MT645C higher · +147 ci (+40%)
MT555B366 ci
MT645C513 ci
Median Utility Tractor183 ci

MT555B is in the 88th percentile; MT645C is in the 94th · 5,580 models

Cylinders

= Effectively tied
MT555B6
MT645C6
Median Utility Tractor4

MT555B is in the 93rd percentile; MT645C is in the 93rd · 5,720 models

Operating Weight

▲ MT645C higher · +11,475 lb (+80%)
MT555B14,320 lb
MT645C25,795 lb
Median Utility Tractor5,303 lb

MT555B is in the 93rd percentile; MT645C is in the 96th · 5,107 models

MT555B (A)MT645C (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecChallenger MT555BChallenger MT645CDifference
ManufacturerChallengerChallengerSame
ModelMT555BMT645C—
CategoryUtilityUtilitySame

Engine

SpecChallenger MT555BChallenger MT645CDifference
ManufacturerPerkins DieselAGCO—
ModelVK 31483Sisu Diesel (Serial No. T00767)—
Power Output171hp242hp▲ MT645C+71 hp · +42%
Rated RPM1,900RPM2,200RPM▲ MT645C+300 RPM · +16%
Cylinders66Same
Displacement366ci513ci▲ MT645C+147 ci · +40%
Bore4.1in4.4in▲ MT645C+0.3 in · +7%
Stroke5in5.7in▲ MT645C+0.7 in · +14%

Transmission

SpecChallenger MT555BChallenger MT645CDifference
TypeAutoPower VIContinuously variable transmission—

Dimensions & Weight

SpecChallenger MT555BChallenger MT645CDifference
Length182in223in▲ MT645C+41 in · +23%
Width81.1inNot recorded—
Height117in133in▲ MT645C+16 in · +14%
Operating Weight14,320lb25,795lb▲ MT645C+11,475 lb · +80%

Hydraulics

SpecChallenger MT555BChallenger MT645CDifference
System TypeHydraulic control system direct engine driveClosed center load sensing—
Pump Flow Capacity32.2gpmNot recorded—

Tires

SpecChallenger MT555BChallenger MT645CDifference
Front Tire Size16.9R30Not recorded—
Rear Tire Size480/80R46Not recorded—

Hitch & Towing

SpecChallenger MT555BChallenger MT645CDifference
Hitch TypeNot recordedThree-Point Hitch—
Hitch CategoryII/IIIIII—
Hitch PositionRearRearSame
Hitch Capacity11,230lb26,460lb▲ MT645C+15,230 lb · +136%

Chassis & Drive

SpecChallenger MT555BChallenger MT645CDifference
Chassis Type4WDNot recorded—
Drive TypeFour-Wheel DriveNot recorded—
Brake TypeMultiple wet disc brakes hydraulically operatedNot recorded—

Electrical

SpecChallenger MT555BChallenger MT645CDifference
Battery Voltage12VNot recorded—
Starter TypeElectricElectricSame

Capacities

SpecChallenger MT555BChallenger MT645CDifference
Coolant7.4galNot recorded—

Category context

Both models against the field

Engine Power

median 55 hp
A · 94th percentile (171 hp)B · 96th percentile (242 hp)

Engine Displacement

median 183 ci
A · 88th percentile (366 ci)B · 94th percentile (513 ci)

Cylinders

median 4
A · 93rd percentile (6)B · 93rd percentile (6)

Operating Weight

median 5,303 lb
A · 93rd percentile (14,320 lb)B · 96th percentile (25,795 lb)

Length

median 137 in
A · 91st percentile (182 in)B · 95th percentile (223 in)
A · MT555BB · MT645CMedian Utility Tractor
Full spec pageChallenger MT555BFull spec pageChallenger MT645C