Head to head · Row Crop

Allis Chalmers D21 Series II vs JCB Fastrac 125

Image not recorded
JCBModel B

JCB Fastrac 125

Utility

power
125 hp
displacement
365 ci
Cylinders
6
Forward gears
18
Full Fastrac 125 specs
Allis ChalmersAllis Chalmers D21 Series II
vs
JCBJCB Fastrac 125

How they compare

Headline specs vs. the whole Row Crop

n = 1,140–1,417

Engine Power

▲ Fastrac 125 higher · +4 hp (+3%)
D21 Series II121 hp
Fastrac 125125 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; Fastrac 125 is in the 42nd · 1,206 models

Engine Displacement

▲ D21 Series II higher · +61 ci (+17%)
D21 Series II426 ci
Fastrac 125365 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; Fastrac 125 is in the 44th · 1,409 models

Cylinders

= Effectively tied
D21 Series II6
Fastrac 1256
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; Fastrac 125 is in the 50th · 1,417 models

Forward Gears

▲ Fastrac 125 higher · +10 (+125%)
D21 Series II8
Fastrac 12518
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; Fastrac 125 is in the 61st · 1,200 models

D21 Series II (A)Fastrac 125 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
ManufacturerAllis ChalmersJCB—
ModelD21 Series IIFastrac 125—
CategoryRow CropUtility—

Engine

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
ManufacturerAllis ChalmersPerkins—
Model35001000—
Power Output121hp125hp▲ Fastrac 125+4 hp · +3%
Rated RPM2,200RPM2,400RPM▲ Fastrac 125+200 RPM · +9%
Cylinders66Same
Displacement426ci365ci▲ D21 Series II+61 ci · +17%
Bore4.3in3.9in▲ D21 Series II+0.4 in · +10%
Stroke5in5inSame

Transmission

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
TypeSliding gear with dry disc clutchSynchromesh—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
Length160in227in▲ Fastrac 125+67 in · +42%
Width91.3inNot recorded—
Height106in115in▲ Fastrac 125+9 in · +8%
Operating Weight9,502lb14,374lb▲ Fastrac 125+4,872 lb · +51%

Hydraulics

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
Steering TypePowerHydraulic power—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
TypeIndependentNot recorded—
Speed 11,000rpm540rpm▲ D21 Series II+460 rpm · +85%
Speed 2Not recorded1,000rpm—

Hitch & Towing

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIII/IICategory 3—
Hitch PositionRearRearSame
Hitch CapacityNot recorded15,435lb—

Chassis & Drive

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
Chassis Type4x2 2WD4x4 4WD—
Drive Type2WD4WD—
Steering TypePowerHydraulic power—
Brake TypeBand actuated discPneumatic dry disc—

Electrical

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
Coolant7.8galNot recorded—

Operator Station

SpecAllis Chalmers D21 Series IIJCB Fastrac 125Difference
TypeOpenCab—

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 · 44th percentile (365 ci)

Cylinders

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

Forward Gears

median 16
A · 16th percentile (8)B · 61st percentile (18)

Operating Weight

median 12,307 lb
A · 28th percentile (9,502 lb)B · 63rd percentile (14,374 lb)
A · D21 Series IIB · Fastrac 125Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageJCB Fastrac 125