Head to head · Row Crop

Allis Chalmers D21 Series II vs John Deere 6810

John Deere 6810 Tractor
John DeereModel B

John Deere 6810

Row Crop

power
125 hp
displacement
414 ci
Cylinders
6
Forward gears
20
Full 6810 specs
Allis ChalmersAllis Chalmers D21 Series II
vs
John DeereJohn Deere 6810

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

▲ 6810 higher · +4 hp (+3%)
D21 Series II121 hp
6810125 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; 6810 is in the 42nd · 1,206 models

Engine Displacement

▲ D21 Series II higher · +12 ci (+3%)
D21 Series II426 ci
6810414 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; 6810 is in the 66th · 1,409 models

Cylinders

= Effectively tied
D21 Series II6
68106
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; 6810 is in the 50th · 1,417 models

Forward Gears

▲ 6810 higher · +12 (+150%)
D21 Series II8
681020
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; 6810 is in the 70th · 1,200 models

D21 Series II (A)6810 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
ManufacturerAllis ChalmersJohn Deere—
ModelD21 Series II6810—
CategoryRow CropRow CropSame

Engine

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
ManufacturerAllis ChalmersJohn Deere—
Model3500Not recorded—
Power Output121hp125hp▲ 6810+4 hp · +3%
Rated RPM2,200RPM2,100RPM▲ D21 Series II+100 RPM · +5%
Cylinders66Same
Displacement426ci414ci▲ D21 Series II+12 ci · +3%
Bore4.3in4.2in▲ D21 Series II+0.1 in · +2%
Stroke5in5inSame

Transmission

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
TypeSliding gear with dry disc clutchFull power shift—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
Length160in180in▲ 6810+20 in · +13%
Width91.3in93in▲ 6810+1.7 in · +2%
Height106in114in▲ 6810+8 in · +8%
Operating Weight9,502lb11,400lb▲ 6810+1,898 lb · +20%

Hydraulics

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
System TypeNot recordedClosed-center load-sensing—
Steering TypePowerPower/Hydrostatic power—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
Hitch TypeThree-Point HitchNot recorded—
Hitch CategoryIII/IIII—
Hitch PositionRearNot recorded—

Chassis & Drive

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
Chassis Type4x2 2WD4x4 MFWD 4WD—
Drive Type2WDMFWD / 4WD—
Steering TypePowerPower/Hydrostatic power—
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
Coolant7.8gal4.1gal▲ D21 Series II+3.7 gal · +90%

Operator Station

SpecAllis Chalmers D21 Series IIJohn Deere 6810Difference
TypeOpenNot recorded—

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 · 66th percentile (414 ci)

Cylinders

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

Forward Gears

median 16
A · 16th percentile (8)B · 70th percentile (20)

Operating Weight

median 12,307 lb
A · 28th percentile (9,502 lb)B · 43rd percentile (11,400 lb)
A · D21 Series IIB · 6810Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageJohn Deere 6810