Head to head · Utility

Allis Chalmers 8550 vs Challenger 65B

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
Challenger 65B Tractor
ChallengerModel B

Challenger 65B

Crawler

power
285 hp
displacement
638 ci
Cylinders
6
Forward gears
10
Full 65B specs
Allis ChalmersAllis Chalmers 8550
vs
ChallengerChallenger 65B

How they compare

Headline specs vs. the whole Utility

n = 3,933–5,720

Engine Power

▲ 8550 higher · +15 hp (+5%)
8550300 hp
65B285 hp
Median Utility Tractor55 hp

8550 is in the 97th percentile; 65B is in the 96th · 5,383 models

Engine Displacement

▲ 8550 higher · +93 ci (+15%)
8550731 ci
65B638 ci
Median Utility Tractor183 ci

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

Cylinders

= Effectively tied
85506
65B6
Median Utility Tractor4

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

Forward Gears

▲ 8550 higher · +10 (+100%)
855020
65B10
Median Utility Tractor12

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

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

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers 8550Challenger 65BDifference
ManufacturerAllis ChalmersChallenger—
Model855065B—
CategoryUtilityCrawler—

Engine

SpecAllis Chalmers 8550Challenger 65BDifference
ManufacturerAllis ChalmersCaterpillar—
Model6120TNot recorded—
Power Output300hp285hp▲ 8550+15 hp · +5%
Rated RPM2,500RPM2,100RPM▲ 8550+400 RPM · +19%
Cylinders66Same
Displacement731ci638ci▲ 8550+93 ci · +15%
Bore5.3in4.8in▲ 8550+0.5 in · +10%
Stroke6.3in6in▲ 8550+0.3 in · +5%

Transmission

SpecAllis Chalmers 8550Challenger 65BDifference
TypePartial Power ShiftFull Power Shift—

Dimensions & Weight

SpecAllis Chalmers 8550Challenger 65BDifference
Length285in107in▲ 8550+178 in · +166%
Width95.5in24.5in▲ 8550+71 in · +290%
Height139inNot recorded—
Operating Weight27,040lb34,030lb▲ 65B+6,990 lb · +26%

Hydraulics

SpecAllis Chalmers 8550Challenger 65BDifference
System TypeClosed CenterClosed—
Steering TypeHydrostatic PowerHydrostatic Differential Steering—

Power Take-off (PTO)

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

Hitch & Towing

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

Chassis & Drive

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

Electrical

SpecAllis Chalmers 8550Challenger 65BDifference
Starter TypeElectricElectricSame

Capacities

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

Operator Station

SpecAllis Chalmers 8550Challenger 65BDifference
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 (285 hp)

Engine Displacement

median 183 ci
A · 96th percentile (731 ci)B · 95th percentile (638 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 (34,030 lb)
A · 8550B · 65BMedian Utility Tractor
Full spec pageAllis Chalmers 8550Full spec pageChallenger 65B