Head to head · Row Crop

Allis Chalmers D21 Series II vs JCB 125-65

JCB 125-65 Tractor
JCBModel B

JCB 125-65

Agricultural

power
121 hp
displacement
365 ci
Cylinders
6
Forward gears
18
Full 125-65 specs
Allis ChalmersAllis Chalmers D21 Series II
vs
JCBJCB 125-65

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

= Effectively tied
D21 Series II121 hp
125-65121 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; 125-65 is in the 40th · 1,206 models

Engine Displacement

▲ D21 Series II higher · +61 ci (+17%)
D21 Series II426 ci
125-65365 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; 125-65 is in the 44th · 1,409 models

Cylinders

= Effectively tied
D21 Series II6
125-656
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; 125-65 is in the 50th · 1,417 models

Forward Gears

▲ 125-65 higher · +10 (+125%)
D21 Series II8
125-6518
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; 125-65 is in the 61st · 1,200 models

D21 Series II (A)125-65 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
ManufacturerAllis ChalmersJCB—
ModelD21 Series II125-65—
CategoryRow CropAgricultural—

Engine

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
ManufacturerAllis ChalmersPerkins—
Model35001000-6—
Power Output121hp121hpSame
Rated RPM2,200RPM2,600RPM▲ 125-65+400 RPM · +18%
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 125-65Difference
TypeSliding gear with dry disc clutchSynchromesh—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
Length160in227in▲ 125-65+67 in · +42%
Width91.3in98in▲ 125-65+6.7 in · +7%
Height106in114in▲ 125-65+8 in · +8%
Operating Weight9,502lb13,885lb▲ 125-65+4,383 lb · +46%

Hydraulics

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
Steering TypePowerNot recorded—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Tires

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
Front Tire SizeNot recorded445/70R24—
Rear Tire SizeNot recorded445/70R24—

Hitch & Towing

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIII/IIIII/IIIN—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
Chassis Type4x2 2WDNot recorded—
Drive Type2WDNot recorded—
Steering TypePowerNot recorded—
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
Coolant7.8gal6.6gal▲ D21 Series II+1.2 gal · +18%

Operator Station

SpecAllis Chalmers D21 Series IIJCB 125-65Difference
TypeOpenCab—

Category context

Both models against the field

Engine Power

median 138 hp
A · 40th percentile (121 hp)B · 40th percentile (121 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 · 61st percentile (13,885 lb)
A · D21 Series IIB · 125-65Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageJCB 125-65