Head to head · Row Crop

Allis Chalmers D21 Series I vs Massey Ferguson 3660F

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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
Image not recorded
Massey FergusonModel B

Massey Ferguson 3660F

Utility

power
102 hp
displacement
201 ci
Cylinders
3
Forward gears
24
Full 3660F specs
Allis ChalmersAllis Chalmers D21 Series I
vs
Massey FergusonMassey Ferguson 3660F

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

▲ D21 Series I higher · +1 hp (<1%)
D21 Series I103 hp
3660F102 hp
Median Row Crop Tractor138 hp

D21 Series I is in the 27th percentile; 3660F is in the 26th · 1,206 models

Engine Displacement

▲ D21 Series I higher · +225 ci (+112%)
D21 Series I426 ci
3660F201 ci
Median Row Crop Tractor391 ci

D21 Series I is in the 72nd percentile; 3660F is in the 8th · 1,409 models

Cylinders

▲ D21 Series I higher · +3 (+100%)
D21 Series I6
3660F3
Median Row Crop Tractor6

D21 Series I is in the 50th percentile; 3660F is in the 2nd · 1,417 models

Forward Gears

▲ 3660F higher · +16 (+200%)
D21 Series I8
3660F24
Median Row Crop Tractor16

D21 Series I is in the 16th percentile; 3660F is in the 81st · 1,200 models

D21 Series I (A)3660F (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
ManufacturerAllis ChalmersMassey Ferguson—
ModelD21 Series I3660F—
CategoryRow CropUtility—

Engine

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
ManufacturerAllis ChalmersAGCO Power—
Model340033CTA—
Power Output103hp102hp▲ D21 Series I+1 hp · <1%
Rated RPM2,200RPM2,200RPMSame
Cylinders63▲ D21 Series I+3 · +100%
Displacement426ci201ci▲ D21 Series I+225 ci · +112%
Bore4.3in4.3inSame
Stroke5in4.7in▲ D21 Series I+0.3 in · +6%

Transmission

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
TypeSliding gear with dry disc clutchNot recorded—

Dimensions & Weight

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
Length161in157in▲ D21 Series I+4 in · +3%
Width91.6in57.1in▲ D21 Series I+34.5 in · +60%
Height107in90.6in▲ D21 Series I+16.4 in · +18%
Operating Weight9,500lb6,559lb▲ D21 Series I+2,941 lb · +45%

Hydraulics

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
Steering TypePowerHydrostatic power—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Tires

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
Front Tire SizeNot recorded6.50R16—
Rear Tire SizeNot recorded320/85R28—

Hitch & Towing

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
Hitch TypeThree-Point HitchNot recorded—
Hitch CategoryIII/IIII/I—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
Chassis Type4x2 2WD4x2 2WDSame
Drive Type2WD2WDSame
Steering TypePowerHydrostatic power—
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
Coolant5.3galNot recorded—

Operator Station

SpecAllis Chalmers D21 Series IMassey Ferguson 3660FDifference
TypeOpenNot recorded—

Category context

Both models against the field

Engine Power

median 138 hp
A · 27th percentile (103 hp)B · 26th percentile (102 hp)

Engine Displacement

median 391 ci
A · 72nd percentile (426 ci)B · 8th percentile (201 ci)

Cylinders

median 6
A · 50th percentile (6)B · 2nd percentile (3)

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 · 14th percentile (6,559 lb)
A · D21 Series IB · 3660FMedian Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IFull spec pageMassey Ferguson 3660F