Head to head · Row Crop

Allis Chalmers D21 Series II vs John Deere 3550

Image not recorded
John DeereModel B

John Deere 3550

Utility

power
125 hp
displacement
359 ci
Cylinders
6
Forward gears
16
Full 3550 specs
Allis ChalmersAllis Chalmers D21 Series II
vs
John DeereJohn Deere 3550

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

▲ 3550 higher · +4 hp (+3%)
D21 Series II121 hp
3550125 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; 3550 is in the 42nd · 1,206 models

Engine Displacement

▲ D21 Series II higher · +67 ci (+19%)
D21 Series II426 ci
3550359 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; 3550 is in the 41st · 1,409 models

Cylinders

= Effectively tied
D21 Series II6
35506
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; 3550 is in the 50th · 1,417 models

Forward Gears

▲ 3550 higher · +8 (+100%)
D21 Series II8
355016
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; 3550 is in the 50th · 1,200 models

D21 Series II (A)3550 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
ManufacturerAllis ChalmersJohn Deere—
ModelD21 Series II3550—
CategoryRow CropUtility—

Engine

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
ManufacturerAllis ChalmersJohn Deere—
Model3500Not recorded—
Power Output121hp125hp▲ 3550+4 hp · +3%
Rated RPM2,200RPM2,300RPM▲ 3550+100 RPM · +5%
Cylinders66Same
Displacement426ci359ci▲ D21 Series II+67 ci · +19%
Bore4.3in4.2in▲ D21 Series II+0.1 in · +2%
Stroke5in4.3in▲ D21 Series II+0.7 in · +16%

Transmission

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
TypeSliding gear with dry disc clutchSynchromesh—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
Length160in184in▲ 3550+24 in · +15%
Width91.3in85in▲ D21 Series II+6.3 in · +7%
Height106in113in▲ 3550+7 in · +7%
Operating Weight9,502lb14,350lb▲ 3550+4,848 lb · +51%

Hydraulics

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
Steering TypePowerPowerSame

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
Hitch TypeThree-Point HitchCategory II—
Hitch CategoryIII/IIIII—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
Chassis Type4x2 2WD4x4 MFWD 4WD—
Drive Type2WD4WD—
Steering TypePowerPowerSame
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
Battery VoltageNot recorded12V—
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
Coolant7.8gal5gal▲ D21 Series II+2.8 gal · +56%

Operator Station

SpecAllis Chalmers D21 Series IIJohn Deere 3550Difference
TypeOpenNot recorded—

Category context

Both models against the field

Engine Power

median 138 hp
A · 40th percentile (121 hp)B · 42nd percentile (125 hp)

Engine Displacement

median 391 ci
A · 72nd percentile (426 ci)B · 41st percentile (359 ci)

Cylinders

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

Forward Gears

median 16
A · 16th percentile (8)B · 50th percentile (16)

Operating Weight

median 12,307 lb
A · 28th percentile (9,502 lb)B · 63rd percentile (14,350 lb)
A · D21 Series IIB · 3550Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageJohn Deere 3550