Head to head · Utility

Allis Chalmers 8550 vs John Deere 8420T

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
John DeereModel B

John Deere 8420T

Crawler

power
284 hp
displacement
496 ci
Cylinders
6
Forward gears
16
Full 8420T specs
Allis ChalmersAllis Chalmers 8550
vs
John DeereJohn Deere 8420T

How they compare

Headline specs vs. the whole Utility

n = 3,933–5,720

Engine Power

▲ 8550 higher · +16 hp (+6%)
8550300 hp
8420T284 hp
Median Utility Tractor55 hp

8550 is in the 97th percentile; 8420T is in the 96th · 5,383 models

Engine Displacement

▲ 8550 higher · +235 ci (+47%)
8550731 ci
8420T496 ci
Median Utility Tractor183 ci

8550 is in the 96th percentile; 8420T is in the 93rd · 5,580 models

Cylinders

= Effectively tied
85506
8420T6
Median Utility Tractor4

8550 is in the 93rd percentile; 8420T is in the 93rd · 5,720 models

Forward Gears

▲ 8550 higher · +4 (+25%)
855020
8420T16
Median Utility Tractor12

8550 is in the 86th percentile; 8420T is in the 73rd · 4,941 models

8550 (A)8420T (B)Median Utility Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers 8550John Deere 8420TDifference
ManufacturerAllis ChalmersJohn Deere—
Model85508420T—
CategoryUtilityCrawler—

Engine

SpecAllis Chalmers 8550John Deere 8420TDifference
ManufacturerAllis ChalmersJohn Deere—
Model6120TNot recorded—
Power Output300hp284hp▲ 8550+16 hp · +6%
Rated RPM2,500RPM2,200RPM▲ 8550+300 RPM · +14%
Cylinders66Same
Displacement731ci496ci▲ 8550+235 ci · +47%
Bore5.3in4.6in▲ 8550+0.7 in · +15%
Stroke6.3in5.1in▲ 8550+1.2 in · +24%

Transmission

SpecAllis Chalmers 8550John Deere 8420TDifference
TypePartial Power ShiftFull power shift—

Dimensions & Weight

SpecAllis Chalmers 8550John Deere 8420TDifference
Length285in207in▲ 8550+78 in · +38%
Width95.5in104in▲ 8420T+8.5 in · +9%
Height139in123in▲ 8550+16 in · +13%
Operating Weight27,040lb26,380lb▲ 8550+660 lb · +3%

Hydraulics

SpecAllis Chalmers 8550John Deere 8420TDifference
System TypeClosed CenterClosed center pressure flow compensated (PFC)—
Steering TypeHydrostatic PowerElectro-hydraulic power—

Power Take-off (PTO)

SpecAllis Chalmers 8550John Deere 8420TDifference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers 8550John Deere 8420TDifference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIV/IIIIII/IIIN—
Hitch PositionNot recordedRear—

Chassis & Drive

SpecAllis Chalmers 8550John Deere 8420TDifference
Chassis Type4x4 Articulated 4WDNot recorded—
Drive Type4WDTrack—
Steering TypeHydrostatic PowerElectro-hydraulic power—
Brake TypeHydraulic Wet DiscsNot recorded—

Electrical

SpecAllis Chalmers 8550John Deere 8420TDifference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers 8550John Deere 8420TDifference
Coolant18gal9gal▲ 8550+9 gal · +100%

Operator Station

SpecAllis Chalmers 8550John Deere 8420TDifference
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 (284 hp)

Engine Displacement

median 183 ci
A · 96th percentile (731 ci)B · 93rd percentile (496 ci)

Cylinders

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

Forward Gears

median 12
A · 86th percentile (20)B · 73rd percentile (16)

Operating Weight

median 5,303 lb
A · 96th percentile (27,040 lb)B · 96th percentile (26,380 lb)
A · 8550B · 8420TMedian Utility Tractor
Full spec pageAllis Chalmers 8550Full spec pageJohn Deere 8420T