Head to head · Row Crop

Allis Chalmers D21 Series II vs Claas Ares 577

Allis ChalmersAllis Chalmers D21 Series II
vs
ClaasClaas Ares 577

How they compare

Headline specs vs. the whole Row Crop

n = 1,140–1,417

Engine Power

= Effectively tied
D21 Series II121 hp
Ares 577121 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; Ares 577 is in the 41st · 1,206 models

Engine Displacement

▲ D21 Series II higher · +150 ci (+54%)
D21 Series II426 ci
Ares 577276 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; Ares 577 is in the 25th · 1,409 models

Cylinders

▲ D21 Series II higher · +2 (+50%)
D21 Series II6
Ares 5774
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; Ares 577 is in the 17th · 1,417 models

Forward Gears

▲ Ares 577 higher · +16 (+200%)
D21 Series II8
Ares 57724
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; Ares 577 is in the 81st · 1,200 models

D21 Series II (A)Ares 577 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
ManufacturerAllis ChalmersClaas—
ModelD21 Series IIAres 577—
CategoryRow CropRow CropSame

Engine

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
ManufacturerAllis ChalmersJohn Deere—
Model3500DPS 4045—
Power Output121hp121hpSame
Rated RPM2,200RPM2,200RPMSame
Cylinders64▲ D21 Series II+2 · +50%
Displacement426ci276ci▲ D21 Series II+150 ci · +54%
Bore4.3in4.2in▲ D21 Series II+0.1 in · +2%
Stroke5in5inSame

Transmission

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
TypeSliding gear with dry disc clutchPower shuttle—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
Length160in186in▲ Ares 577+26 in · +16%
Width91.3inNot recorded—
Height106in114in▲ Ares 577+8 in · +8%
Operating Weight9,502lb10,406lb▲ Ares 577+904 lb · +10%

Hydraulics

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
System TypeNot recordedOpen center—
Steering TypePowerPowerSame

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Tires

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
Front Tire SizeNot recorded14.9-28—
Rear Tire SizeNot recorded18.4-38—

Hitch & Towing

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
Hitch TypeThree-Point HitchNot recorded—
Hitch CategoryIII/IINot recorded—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
Chassis Type4x2 2WD4x4 MFWD 4WD—
Drive Type2WD4WD—
Steering TypePowerPowerSame
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
Coolant7.8galNot recorded—

Operator Station

SpecAllis Chalmers D21 Series IIClaas Ares 577Difference
TypeOpenNot recorded—

Category context

Both models against the field

Engine Power

median 138 hp
A · 40th percentile (121 hp)B · 41st percentile (121 hp)

Engine Displacement

median 391 ci
A · 72nd percentile (426 ci)B · 25th percentile (276 ci)

Cylinders

median 6
A · 50th percentile (6)B · 17th percentile (4)

Forward Gears

median 16
A · 16th percentile (8)B · 81st percentile (24)

Operating Weight

median 12,307 lb
A · 28th percentile (9,502 lb)B · 35th percentile (10,406 lb)
A · D21 Series IIB · Ares 577Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageClaas Ares 577