Head to head · Row Crop

Allis Chalmers D21 Series I vs Valmet 6600

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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
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ValmetModel B

Valmet 6600

Row Crop

power
103 hp
displacement
268 ci
Cylinders
4
Forward gears
24
Full 6600 specs
Allis ChalmersAllis Chalmers D21 Series I
vs
ValmetValmet 6600

How they compare

Headline specs vs. the whole Row Crop

n = 1,140–1,417

Engine Power

= Effectively tied
D21 Series I103 hp
6600103 hp
Median Row Crop Tractor138 hp

D21 Series I is in the 27th percentile; 6600 is in the 27th · 1,206 models

Engine Displacement

▲ D21 Series I higher · +158 ci (+59%)
D21 Series I426 ci
6600268 ci
Median Row Crop Tractor391 ci

D21 Series I is in the 72nd percentile; 6600 is in the 21st · 1,409 models

Cylinders

▲ D21 Series I higher · +2 (+50%)
D21 Series I6
66004
Median Row Crop Tractor6

D21 Series I is in the 50th percentile; 6600 is in the 17th · 1,417 models

Forward Gears

▲ 6600 higher · +16 (+200%)
D21 Series I8
660024
Median Row Crop Tractor16

D21 Series I is in the 16th percentile; 6600 is in the 81st · 1,200 models

D21 Series I (A)6600 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IValmet 6600Difference
ManufacturerAllis ChalmersValmet—
ModelD21 Series I6600—
CategoryRow CropRow CropSame

Engine

SpecAllis Chalmers D21 Series IValmet 6600Difference
ManufacturerAllis ChalmersSisuDiesel—
Model3400420 DS—
Power Output103hp103hpSame
Rated RPM2,200RPM2,225RPM▲ 6600+25 RPM · +1%
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 IValmet 6600Difference
TypeSliding gear with dry disc clutchTwo-speed power shift—

Dimensions & Weight

SpecAllis Chalmers D21 Series IValmet 6600Difference
Length161in174in▲ 6600+13 in · +8%
Width91.6inNot recorded—
Height107in108in▲ 6600+1 in · <1%
Operating Weight9,500lb9,700lb▲ 6600+200 lb · +2%

Hydraulics

SpecAllis Chalmers D21 Series IValmet 6600Difference
Steering TypePowerPowerSame

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IValmet 6600Difference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers D21 Series IValmet 6600Difference
Hitch TypeThree-Point HitchNot recorded—
Hitch CategoryIII/IIII—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecAllis Chalmers D21 Series IValmet 6600Difference
Chassis Type4x2 2WD4x4 MFWD 4WD—
Drive Type2WD4WD—
Steering TypePowerPowerSame
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IValmet 6600Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IValmet 6600Difference
Coolant5.3galNot recorded—

Operator Station

SpecAllis Chalmers D21 Series IValmet 6600Difference
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 · 81st percentile (24)

Operating Weight

median 12,307 lb
A · 28th percentile (9,500 lb)B · 29th percentile (9,700 lb)
A · D21 Series IB · 6600Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IFull spec pageValmet 6600