Head to head · Utility

Allis Chalmers 8550 vs Challenger MT665E

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 MT665E

Agricultural

power
290 hp
displacement
513 ci
Cylinders
6
Forward gears
Not recorded
Full MT665E specs
Allis ChalmersAllis Chalmers 8550
vs
ChallengerChallenger MT665E

How they compare

Headline specs vs. the whole Utility

n = 4,321–5,720

Engine Power

▲ 8550 higher · +10 hp (+3%)
8550300 hp
MT665E290 hp
Median Utility Tractor55 hp

8550 is in the 97th percentile; MT665E is in the 96th · 5,383 models

Engine Displacement

▲ 8550 higher · +218 ci (+42%)
8550731 ci
MT665E513 ci
Median Utility Tractor183 ci

8550 is in the 96th percentile; MT665E is in the 94th · 5,580 models

Cylinders

= Effectively tied
85506
MT665E6
Median Utility Tractor4

8550 is in the 93rd percentile; MT665E is in the 93rd · 5,720 models

Operating Weight

▲ 8550 higher · +2,370 lb (+10%)
855027,040 lb
MT665E24,670 lb
Median Utility Tractor5,303 lb

8550 is in the 96th percentile; MT665E is in the 96th · 5,107 models

8550 (A)MT665E (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers 8550Challenger MT665EDifference
ManufacturerAllis ChalmersChallenger—
Model8550MT665E—
CategoryUtilityAgricultural—

Engine

SpecAllis Chalmers 8550Challenger MT665EDifference
ManufacturerAllis ChalmersAGCO POWER—
Model6120TNot recorded—
Power Output300hp290hp▲ 8550+10 hp · +3%
Rated RPM2,500RPM2,100RPM▲ 8550+400 RPM · +19%
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 MT665EDifference
TypePartial Power ShiftContinuously Variable Transmission (CVT)—

Dimensions & Weight

SpecAllis Chalmers 8550Challenger MT665EDifference
Length285in219in▲ 8550+66 in · +30%
Width95.5inNot recorded—
Height139in141in▲ MT665E+2 in · +1%
WheelbaseNot recorded122in—
Operating Weight27,040lb24,670lb▲ 8550+2,370 lb · +10%

Hydraulics

SpecAllis Chalmers 8550Challenger MT665EDifference
System TypeClosed CenterClosed Center Load Sensing (CCLS)—
Steering TypeHydrostatic PowerHydrostatic PowerSame

Power Take-off (PTO)

SpecAllis Chalmers 8550Challenger MT665EDifference
TypeIndependentNot recorded—
Speed 11,000rpm999rpm▲ 8550+1 rpm · <1%
Speed 2Not recorded1,065rpm—

Hitch & Towing

SpecAllis Chalmers 8550Challenger MT665EDifference
Hitch TypeThree-Point HitchNot recorded—
Hitch CategoryIV/IIIIII/IVN—
Hitch PositionNot recordedRear—

Chassis & Drive

SpecAllis Chalmers 8550Challenger MT665EDifference
Chassis Type4x4 Articulated 4WDNot recorded—
Drive Type4WDNot recorded—
Steering TypeHydrostatic PowerHydrostatic PowerSame
Brake TypeHydraulic Wet DiscsNot recorded—

Electrical

SpecAllis Chalmers 8550Challenger MT665EDifference
Battery VoltageNot recorded12V—
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers 8550Challenger MT665EDifference
Coolant18galNot recorded—

Operator Station

SpecAllis Chalmers 8550Challenger MT665EDifference
TypeAcousta Cab II with heat and air-conditioningNot recorded—

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)

Operating Weight

median 5,303 lb
A · 96th percentile (27,040 lb)B · 96th percentile (24,670 lb)

Length

median 137 in
A · 99th percentile (285 in)B · 95th percentile (219 in)
A · 8550B · MT665EMedian Utility Tractor
Full spec pageAllis Chalmers 8550Full spec pageChallenger MT665E