Head to head · Row Crop

Allis Chalmers D21 Series I vs Valtra 6550Hi

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Allis ChalmersModel A

Allis Chalmers D21 Series I

Row Crop

power
103 hp
displacement
426 ci
Cylinders
6
Forward gears
8
Full D21 Series I specs
Valtra 6550Hi Tractor
ValtraModel B

Valtra 6550Hi

Row Crop

power
103 hp
displacement
268 ci
Cylinders
4
Forward gears
36
Full 6550Hi specs
Allis ChalmersAllis Chalmers D21 Series I
vs
ValtraValtra 6550Hi

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

= Effectively tied
D21 Series I103 hp
6550Hi103 hp
Median Row Crop Tractor138 hp

D21 Series I is in the 27th percentile; 6550Hi is in the 27th · 1,206 models

Engine Displacement

▲ D21 Series I higher · +158 ci (+59%)
D21 Series I426 ci
6550Hi268 ci
Median Row Crop Tractor391 ci

D21 Series I is in the 72nd percentile; 6550Hi is in the 21st · 1,409 models

Cylinders

▲ D21 Series I higher · +2 (+50%)
D21 Series I6
6550Hi4
Median Row Crop Tractor6

D21 Series I is in the 50th percentile; 6550Hi is in the 17th · 1,417 models

Forward Gears

▲ 6550Hi higher · +28 (+350%)
D21 Series I8
6550Hi36
Median Row Crop Tractor16

D21 Series I is in the 16th percentile; 6550Hi is in the 95th · 1,200 models

D21 Series I (A)6550Hi (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
ManufacturerAllis ChalmersValtra—
ModelD21 Series I6550Hi—
CategoryRow CropRow CropSame

Engine

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
ManufacturerAllis ChalmersSisuDiesel—
Model340044 ET—
Power Output103hp103hpSame
Rated RPM2,200RPM2,200RPMSame
Cylinders64▲ D21 Series I+2 · +50%
Displacement426ci268ci▲ D21 Series I+158 ci · +59%
Bore4.3in4.3inSame
Stroke5in4.7in▲ D21 Series I+0.3 in · +6%

Transmission

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
TypeSliding gear with dry disc clutchHiTech three-speed power shift—

Dimensions & Weight

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
Length161in179in▲ 6550Hi+18 in · +11%
Width91.6in89.8in▲ D21 Series I+1.8 in · +2%
Height107in108in▲ 6550Hi+1 in · <1%
Operating Weight9,500lb10,274lb▲ 6550Hi+774 lb · +8%

Hydraulics

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
Steering TypePowerPowerSame

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
Hitch TypeThree-Point HitchCategory 3 Hitch—
Hitch CategoryIII/IIII—
Hitch PositionRearRearSame

Chassis & Drive

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
Chassis Type4x2 2WD4x4 MFWD 4WD—
Drive Type2WD4WD—
Steering TypePowerPowerSame
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
Coolant5.3galNot recorded—

Operator Station

SpecAllis Chalmers D21 Series IValtra 6550HiDifference
TypeOpenCab—

Category context

Both models against the field

Engine Power

median 138 hp
A · 27th percentile (103 hp)B · 27th percentile (103 hp)

Engine Displacement

median 391 ci
A · 72nd percentile (426 ci)B · 21st percentile (268 ci)

Cylinders

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

Forward Gears

median 16
A · 16th percentile (8)B · 95th percentile (36)

Operating Weight

median 12,307 lb
A · 28th percentile (9,500 lb)B · 33rd percentile (10,274 lb)
A · D21 Series IB · 6550HiMedian Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IFull spec pageValtra 6550Hi