Head to head · Row Crop

Allis Chalmers D21 Series II vs John Deere 6800

John Deere 6800 Tractor
John DeereModel B

John Deere 6800

Agricultural

power
120 hp
displacement
414 ci
Cylinders
6
Forward gears
20
Full 6800 specs
Allis ChalmersAllis Chalmers D21 Series II
vs
John DeereJohn Deere 6800

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

▲ D21 Series II higher · +1 hp (<1%)
D21 Series II121 hp
6800120 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; 6800 is in the 39th · 1,206 models

Engine Displacement

▲ D21 Series II higher · +12 ci (+3%)
D21 Series II426 ci
6800414 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; 6800 is in the 66th · 1,409 models

Cylinders

= Effectively tied
D21 Series II6
68006
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; 6800 is in the 50th · 1,417 models

Forward Gears

▲ 6800 higher · +12 (+150%)
D21 Series II8
680020
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; 6800 is in the 70th · 1,200 models

D21 Series II (A)6800 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
ManufacturerAllis ChalmersJohn Deere—
ModelD21 Series II6800—
CategoryRow CropAgricultural—

Engine

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
ManufacturerAllis ChalmersJohn Deere—
Model35006068—
Power Output121hp120hp▲ D21 Series II+1 hp · <1%
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 6800Difference
TypeSliding gear with dry disc clutchpartial power shift—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
Length160in180in▲ 6800+20 in · +13%
Width91.3in93in▲ 6800+1.7 in · +2%
Height106in111in▲ 6800+5 in · +5%
Operating Weight9,502lb11,000lb▲ 6800+1,498 lb · +16%

Hydraulics

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
System TypeNot recordedclosed center—
Steering TypePowerNot recorded—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
TypeIndependentNot recorded—
Speed 11,000rpmNot recorded—

Hitch & Towing

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIII/IIII/IIIN—
Hitch PositionRearRearSame

Chassis & Drive

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
Chassis Type4x2 2WDNot recorded—
Drive Type2WDNot recorded—
Steering TypePowerNot recorded—
Brake TypeBand actuated discNot recorded—

Electrical

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
Coolant7.8galNot recorded—

Operator Station

SpecAllis Chalmers D21 Series IIJohn Deere 6800Difference
TypeOpenCab—

Category context

Both models against the field

Engine Power

median 138 hp
A · 40th percentile (121 hp)B · 39th percentile (120 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 · 39th percentile (11,000 lb)
A · D21 Series IIB · 6800Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageJohn Deere 6800