Head to head · Agricultural

Allis Chalmers HD21 vs John Deere 8225R

Allis Chalmers HD21 Tractor
Allis ChalmersModel A

Allis Chalmers HD21

Agricultural

power
225 hp
displacement
844 ci
Cylinders
6
Forward gears
2
Full HD21 specs
Image not recorded
John DeereModel B

John Deere 8225R

Row Crop

power
225 hp
displacement
548 ci
Cylinders
6
Forward gears
16
Full 8225R specs
Allis ChalmersAllis Chalmers HD21
vs
John DeereJohn Deere 8225R

How they compare

Headline specs vs. the whole Agricultural

n = 795–1,130

Engine Power

= Effectively tied
HD21225 hp
8225R225 hp
Median Agricultural Tractor110 hp

HD21 is in the 84th percentile; 8225R is in the 84th · 1,028 models

Engine Displacement

▲ HD21 higher · +296 ci (+54%)
HD21844 ci
8225R548 ci
Median Agricultural Tractor336 ci

HD21 is in the 96th percentile; 8225R is in the 90th · 1,083 models

Cylinders

= Effectively tied
HD216
8225R6
Median Agricultural Tractor5.5

HD21 is in the 74th percentile; 8225R is in the 74th · 1,130 models

Forward Gears

▲ 8225R higher · +14 (+700%)
HD212
8225R16
Median Agricultural Tractor16

HD21 is in the 1st percentile; 8225R is in the 50th · 972 models

HD21 (A)8225R (B)Median Agricultural Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers HD21John Deere 8225RDifference
ManufacturerAllis ChalmersJohn Deere—
ModelHD218225R—
CategoryAgriculturalRow Crop—

Engine

SpecAllis Chalmers HD21John Deere 8225RDifference
ManufacturerAllis-ChalmersJohn Deere—
Power Output225hp225hpSame
Rated RPM1,800RPM2,100RPM▲ 8225R+300 RPM · +17%
Cylinders66Same
Displacement844ci548ci▲ HD21+296 ci · +54%
Bore5.3in4.7in▲ HD21+0.6 in · +13%
Stroke6.5in5.4in▲ HD21+1.1 in · +20%

Transmission

SpecAllis Chalmers HD21John Deere 8225RDifference
TypeTorque ConverterSelective gear fixed ratio with full range operator controlled power shift—

Dimensions & Weight

SpecAllis Chalmers HD21John Deere 8225RDifference
Length198in241in▲ 8225R+43 in · +22%
Height99in128in▲ 8225R+29 in · +29%
WheelbaseNot recorded119in—
Operating Weight45,500lb21,920lb▲ HD21+23,580 lb · +108%

Hydraulics

SpecAllis Chalmers HD21John Deere 8225RDifference
System TypeNot recordedClosed center, pressure and flow compensated—
Pump Flow CapacityNot recorded46.4gpm—
Steering TypeNot recordedHydrostatic power—

Tires

SpecAllis Chalmers HD21John Deere 8225RDifference
Front Tire SizeNot recorded11.00-24—
Rear Tire SizeNot recorded480/80R46—

Tread Width

SpecAllis Chalmers HD21John Deere 8225RDifference
Front Tread WidthNot recorded60in—
Rear TreadNot recorded60in—
Front Tread AdjustmentNot recorded60.0 to 88.0 in—
Rear Tread AdjustmentNot recorded60.0 to 132.5 in—

Hitch & Towing

SpecAllis Chalmers HD21John Deere 8225RDifference
Hitch TypeNot recordedThree-Point Hitch—
Hitch CategoryNot recordedCategory 3—
Hitch PositionNot recordedRear—

Chassis & Drive

SpecAllis Chalmers HD21John Deere 8225RDifference
Chassis TypeNot recordedFront wheel assist—
Drive TypeNot recorded4WD—
Steering TypeNot recordedHydrostatic power—

Electrical

SpecAllis Chalmers HD21John Deere 8225RDifference
Starter TypeElectricElectric Starter—

Capacities

SpecAllis Chalmers HD21John Deere 8225RDifference
Coolant20gal10.6gal▲ HD21+9.4 gal · +89%

Operator Station

SpecAllis Chalmers HD21John Deere 8225RDifference
TypeNot recordedCab—

Category context

Both models against the field

Engine Power

median 110 hp
A · 84th percentile (225 hp)B · 84th percentile (225 hp)

Engine Displacement

median 336 ci
A · 96th percentile (844 ci)B · 90th percentile (548 ci)

Cylinders

median 5.5
A · 74th percentile (6)B · 74th percentile (6)

Forward Gears

median 16
A · 1st percentile (2)B · 50th percentile (16)

Operating Weight

median 10,914 lb
A · 99th percentile (45,500 lb)B · 88th percentile (21,920 lb)
A · HD21B · 8225RMedian Agricultural Tractor
Full spec pageAllis Chalmers HD21Full spec pageJohn Deere 8225R