Head to head · Row Crop

Allis Chalmers D21 Series II vs John Deere 6140D

John Deere 6140D Tractor
John DeereModel B

John Deere 6140D

Utility

power
123 hp
displacement
276 ci
Cylinders
4
Forward gears
9
Full 6140D specs
Allis ChalmersAllis Chalmers D21 Series II
vs
John DeereJohn Deere 6140D

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

▲ 6140D higher · +2 hp (+2%)
D21 Series II121 hp
6140D123 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; 6140D is in the 41st · 1,206 models

Engine Displacement

▲ D21 Series II higher · +150 ci (+54%)
D21 Series II426 ci
6140D276 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; 6140D is in the 25th · 1,409 models

Cylinders

▲ D21 Series II higher · +2 (+50%)
D21 Series II6
6140D4
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; 6140D is in the 17th · 1,417 models

Forward Gears

▲ 6140D higher · +1 (+13%)
D21 Series II8
6140D9
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; 6140D is in the 20th · 1,200 models

D21 Series II (A)6140D (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
ManufacturerAllis ChalmersJohn Deere—
ModelD21 Series II6140D—
CategoryRow CropUtility—

Engine

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
ManufacturerAllis ChalmersJohn Deere—
Model35004045H PowerTech E—
Power Output121hp123hp▲ 6140D+2 hp · +2%
Rated RPM2,200RPM2,200RPMSame
Cylinders64▲ D21 Series II+2 · +50%
Displacement426ci276ci▲ D21 Series II+150 ci · +54%
Bore4.3in4.2in▲ D21 Series II+0.1 in · +2%
Stroke5in5inSame

Transmission

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
TypeSliding gear with dry disc clutchPartially synchronized with power shuttle—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
Length160in166in▲ 6140D+6 in · +4%
Width91.3in71.7in▲ D21 Series II+19.6 in · +27%
Height106in108in▲ 6140D+2 in · +2%
Operating Weight9,502lb10,030lb▲ 6140D+528 lb · +6%

Hydraulics

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
System TypeNot recordedOpen center—
PressureNot recorded2,918psi—
Steering TypePowerHydrostatic power—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
TypeIndependentIndependent with dry disc clutch—
Speed 11,000rpm540rpm▲ D21 Series II+460 rpm · +85%
Speed 2Not recorded1,000rpm—

Hitch & Towing

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIII/IIII—
Hitch PositionRearRearSame
Hitch CapacityNot recorded6,800lb—

Chassis & Drive

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
Chassis Type4x2 2WD4x4 MFWD 4WD—
Drive Type2WD4WD—
Steering TypePowerHydrostatic power—
Brake TypeBand actuated discDifferential mechanical wet disc—

Electrical

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
Coolant7.8gal4.4gal▲ D21 Series II+3.5 gal · +81%

Operator Station

SpecAllis Chalmers D21 Series IIJohn Deere 6140DDifference
TypeOpenCab—

Category context

Both models against the field

Engine Power

median 138 hp
A · 40th percentile (121 hp)B · 41st percentile (123 hp)

Engine Displacement

median 391 ci
A · 72nd percentile (426 ci)B · 25th percentile (276 ci)

Cylinders

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

Forward Gears

median 16
A · 16th percentile (8)B · 20th percentile (9)

Operating Weight

median 12,307 lb
A · 28th percentile (9,502 lb)B · 32nd percentile (10,030 lb)
A · D21 Series IIB · 6140DMedian Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageJohn Deere 6140D