Head to head · Row Crop

Allis Chalmers D21 Series I vs Ford 8240

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Allis ChalmersModel A

Allis Chalmers D21 Series I

Row Crop

power
103 hp
displacement
426 ci
Cylinders
6
Forward gears
8
Full D21 Series I specs
Image not recorded
FordModel B

Ford 8240

Utility

power
101 hp
displacement
456 ci
Cylinders
6
Forward gears
8
Full 8240 specs
Allis ChalmersAllis Chalmers D21 Series I
vs
FordFord 8240

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

▲ D21 Series I higher · +2 hp (+2%)
D21 Series I103 hp
8240101 hp
Median Row Crop Tractor138 hp

D21 Series I is in the 27th percentile; 8240 is in the 26th · 1,206 models

Engine Displacement

▲ 8240 higher · +30 ci (+7%)
D21 Series I426 ci
8240456 ci
Median Row Crop Tractor391 ci

D21 Series I is in the 72nd percentile; 8240 is in the 80th · 1,409 models

Cylinders

= Effectively tied
D21 Series I6
82406
Median Row Crop Tractor6

D21 Series I is in the 50th percentile; 8240 is in the 50th · 1,417 models

Forward Gears

= Effectively tied
D21 Series I8
82408
Median Row Crop Tractor16

D21 Series I is in the 16th percentile; 8240 is in the 16th · 1,200 models

D21 Series I (A)8240 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IFord 8240Difference
ManufacturerAllis ChalmersFord—
ModelD21 Series I8240—
CategoryRow CropUtility—

Engine

SpecAllis Chalmers D21 Series IFord 8240Difference
ManufacturerAllis ChalmersFord New Holland—
Model3400Genesis—
Power Output103hp101hp▲ D21 Series I+2 hp · +2%
Rated RPM2,200RPM2,069RPM▲ D21 Series I+131 RPM · +6%
Cylinders66Same
Displacement426ci456ci▲ 8240+30 ci · +7%
Bore4.3in4.4in▲ 8240+0.1 in · +2%
Stroke5in5inSame

Transmission

SpecAllis Chalmers D21 Series IFord 8240Difference
TypeSliding gear with dry disc clutchSynchroShift—

Dimensions & Weight

SpecAllis Chalmers D21 Series IFord 8240Difference
Length161in176in▲ 8240+15 in · +9%
Width91.6in83in▲ D21 Series I+8.6 in · +10%
Height107inNot recorded—
Operating Weight9,500lb8,684lb▲ D21 Series I+816 lb · +9%

Hydraulics

SpecAllis Chalmers D21 Series IFord 8240Difference
System TypeNot recordedGear pump—
Pump Flow CapacityNot recorded16.3gpm—
PressureNot recorded2,030psi—
Steering TypePowerPower steering—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IFord 8240Difference
TypeIndependentNot recorded—
Speed 11,000rpm540rpm▲ D21 Series I+460 rpm · +85%
Speed 2Not recorded1,000rpm—

Tires

SpecAllis Chalmers D21 Series IFord 8240Difference
Front Tire SizeNot recorded14.9R28—
Rear Tire SizeNot recorded18.4R38—

Hitch & Towing

SpecAllis Chalmers D21 Series IFord 8240Difference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIII/IIII—
Hitch PositionRearRearSame
Hitch CapacityNot recorded6,250lb—

Chassis & Drive

SpecAllis Chalmers D21 Series IFord 8240Difference
Chassis Type4x2 2WDNot recorded—
Drive Type2WDNot recorded—
Steering TypePowerPower steering—
Brake TypeBand actuated discMultiple wet disc, hydraulically actuated—

Electrical

SpecAllis Chalmers D21 Series IFord 8240Difference
Starter TypeElectricElectric Starter—

Capacities

SpecAllis Chalmers D21 Series IFord 8240Difference
Coolant5.3gal5.3galSame

Operator Station

SpecAllis Chalmers D21 Series IFord 8240Difference
TypeOpenCab—

Category context

Both models against the field

Engine Power

median 138 hp
A · 27th percentile (103 hp)B · 26th percentile (101 hp)

Engine Displacement

median 391 ci
A · 72nd percentile (426 ci)B · 80th percentile (456 ci)

Cylinders

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

Forward Gears

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

Operating Weight

median 12,307 lb
A · 28th percentile (9,500 lb)B · 24th percentile (8,684 lb)
A · D21 Series IB · 8240Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IFull spec pageFord 8240