Head to head · Utility

Allis Chalmers 8550 vs Challenger 65D

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 65D

Crawler

power
300 hp
displacement
636 ci
Cylinders
6
Forward gears
10
Full 65D specs
Allis ChalmersAllis Chalmers 8550
vs
ChallengerChallenger 65D

How they compare

Headline specs vs. the whole Utility

n = 3,933–5,720

Engine Power

= Effectively tied
8550300 hp
65D300 hp
Median Utility Tractor55 hp

8550 is in the 97th percentile; 65D is in the 97th · 5,383 models

Engine Displacement

▲ 8550 higher · +95 ci (+15%)
8550731 ci
65D636 ci
Median Utility Tractor183 ci

8550 is in the 96th percentile; 65D is in the 95th · 5,580 models

Cylinders

= Effectively tied
85506
65D6
Median Utility Tractor4

8550 is in the 93rd percentile; 65D is in the 93rd · 5,720 models

Forward Gears

▲ 8550 higher · +10 (+100%)
855020
65D10
Median Utility Tractor12

8550 is in the 86th percentile; 65D is in the 39th · 4,941 models

8550 (A)65D (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers 8550Challenger 65DDifference
ManufacturerAllis ChalmersChallenger—
Model855065D—
CategoryUtilityCrawler—

Engine

SpecAllis Chalmers 8550Challenger 65DDifference
ManufacturerAllis ChalmersCaterpillar—
Model6120T3306 DITA—
Power Output300hp300hpSame
Rated RPM2,500RPM2,100RPM▲ 8550+400 RPM · +19%
Cylinders66Same
Displacement731ci636ci▲ 8550+95 ci · +15%
Bore5.3in4.8in▲ 8550+0.5 in · +10%
Stroke6.3in6in▲ 8550+0.3 in · +5%

Transmission

SpecAllis Chalmers 8550Challenger 65DDifference
TypePartial Power ShiftFull power shift—

Dimensions & Weight

SpecAllis Chalmers 8550Challenger 65DDifference
Length285in232in▲ 8550+53 in · +23%
Width95.5in120in▲ 65D+24.5 in · +26%
Height139in144in▲ 65D+5 in · +4%
Operating Weight27,040lb35,235lb▲ 65D+8,195 lb · +30%

Hydraulics

SpecAllis Chalmers 8550Challenger 65DDifference
System TypeClosed CenterClosed-center pressure-compensated—
Steering TypeHydrostatic PowerHydrostatic differential steering—

Power Take-off (PTO)

SpecAllis Chalmers 8550Challenger 65DDifference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers 8550Challenger 65DDifference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIV/IIIIII—
Hitch PositionNot recordedRear—

Chassis & Drive

SpecAllis Chalmers 8550Challenger 65DDifference
Chassis Type4x4 Articulated 4WDNot recorded—
Drive Type4WDNot recorded—
Steering TypeHydrostatic PowerHydrostatic differential steering—
Brake TypeHydraulic Wet DiscsNot recorded—

Electrical

SpecAllis Chalmers 8550Challenger 65DDifference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers 8550Challenger 65DDifference
Coolant18gal11gal▲ 8550+7 gal · +64%

Operator Station

SpecAllis Chalmers 8550Challenger 65DDifference
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 · 97th percentile (300 hp)

Engine Displacement

median 183 ci
A · 96th percentile (731 ci)B · 95th percentile (636 ci)

Cylinders

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

Forward Gears

median 12
A · 86th percentile (20)B · 39th percentile (10)

Operating Weight

median 5,303 lb
A · 96th percentile (27,040 lb)B · 98th percentile (35,235 lb)
A · 8550B · 65DMedian Utility Tractor
Full spec pageAllis Chalmers 8550Full spec pageChallenger 65D