Head to head · Utility

Allis Chalmers 8550 vs Challenger MT665B

Allis Chalmers 8550 Tractor
Allis ChalmersModel A

Allis Chalmers 8550

Utility

power
300 hp
displacement
731 ci
Cylinders
6
Forward gears
20
Full 8550 specs
Image not recorded
ChallengerModel B

Challenger MT665B

Agricultural

power
290 hp
displacement
513 ci
Cylinders
6
Forward gears
18
Full MT665B specs
Allis ChalmersAllis Chalmers 8550
vs
ChallengerChallenger MT665B

How they compare

Headline specs vs. the whole Utility

n = 3,933–5,720

Engine Power

▲ 8550 higher · +10 hp (+3%)
8550300 hp
MT665B290 hp
Median Utility Tractor55 hp

8550 is in the 97th percentile; MT665B is in the 96th · 5,383 models

Engine Displacement

▲ 8550 higher · +218 ci (+42%)
8550731 ci
MT665B513 ci
Median Utility Tractor183 ci

8550 is in the 96th percentile; MT665B is in the 94th · 5,580 models

Cylinders

= Effectively tied
85506
MT665B6
Median Utility Tractor4

8550 is in the 93rd percentile; MT665B is in the 93rd · 5,720 models

Forward Gears

▲ 8550 higher · +2 (+11%)
855020
MT665B18
Median Utility Tractor12

8550 is in the 86th percentile; MT665B is in the 83rd · 4,941 models

8550 (A)MT665B (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers 8550Challenger MT665BDifference
ManufacturerAllis ChalmersChallenger—
Model8550MT665B—
CategoryUtilityAgricultural—

Engine

SpecAllis Chalmers 8550Challenger MT665BDifference
ManufacturerAllis ChalmersSisu—
Model6120T84ETA—
Power Output300hp290hp▲ 8550+10 hp · +3%
Rated RPM2,500RPM2,200RPM▲ 8550+300 RPM · +14%
Cylinders66Same
Displacement731ci513ci▲ 8550+218 ci · +42%
Bore5.3in4.4in▲ 8550+0.9 in · +20%
Stroke6.3in5.7in▲ 8550+0.6 in · +11%

Transmission

SpecAllis Chalmers 8550Challenger MT665BDifference
TypePartial Power ShiftPower Shift—

Dimensions & Weight

SpecAllis Chalmers 8550Challenger MT665BDifference
Length285in206in▲ 8550+79 in · +38%
Width95.5in118in▲ MT665B+22.5 in · +24%
Height139in124in▲ 8550+15 in · +12%
Operating Weight27,040lb19,550lb▲ 8550+7,490 lb · +38%

Hydraulics

SpecAllis Chalmers 8550Challenger MT665BDifference
System TypeClosed CenterOpen Center—
Steering TypeHydrostatic PowerPower Steering—

Power Take-off (PTO)

SpecAllis Chalmers 8550Challenger MT665BDifference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers 8550Challenger MT665BDifference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIV/IIIIII—
Hitch PositionNot recordedRear—

Chassis & Drive

SpecAllis Chalmers 8550Challenger MT665BDifference
Chassis Type4x4 Articulated 4WD4x4—
Drive Type4WD4WDSame
Steering TypeHydrostatic PowerPower Steering—
Brake TypeHydraulic Wet DiscsManual External Compression Band—

Electrical

SpecAllis Chalmers 8550Challenger MT665BDifference
Starter TypeElectricElectric Starter—

Capacities

SpecAllis Chalmers 8550Challenger MT665BDifference
Coolant18gal8.9gal▲ 8550+9.1 gal · +102%

Operator Station

SpecAllis Chalmers 8550Challenger MT665BDifference
TypeAcousta Cab II with heat and air-conditioningCab—

Category context

Both models against the field

Engine Power

median 55 hp
A · 97th percentile (300 hp)B · 96th percentile (290 hp)

Engine Displacement

median 183 ci
A · 96th percentile (731 ci)B · 94th percentile (513 ci)

Cylinders

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

Forward Gears

median 12
A · 86th percentile (20)B · 83rd percentile (18)

Operating Weight

median 5,303 lb
A · 96th percentile (27,040 lb)B · 95th percentile (19,550 lb)
A · 8550B · MT665BMedian Utility Tractor
Full spec pageAllis Chalmers 8550Full spec pageChallenger MT665B