Head to head · Row Crop

Allis Chalmers D21 Series II vs Ford TW-10

Image not recorded
FordModel B

Ford TW-10

Row Crop

power
123 hp
displacement
401 ci
Cylinders
6
Forward gears
16
Full TW-10 specs
Allis ChalmersAllis Chalmers D21 Series II
vs
FordFord TW-10

How they compare

Headline specs vs. the whole Row Crop

n = 806–1,417

Engine Power

▲ TW-10 higher · +2 hp (+2%)
D21 Series II121 hp
TW-10123 hp
Median Row Crop Tractor138 hp

D21 Series II is in the 40th percentile; TW-10 is in the 41st · 1,206 models

Engine Displacement

▲ D21 Series II higher · +25 ci (+6%)
D21 Series II426 ci
TW-10401 ci
Median Row Crop Tractor391 ci

D21 Series II is in the 72nd percentile; TW-10 is in the 51st · 1,409 models

Cylinders

= Effectively tied
D21 Series II6
TW-106
Median Row Crop Tractor6

D21 Series II is in the 50th percentile; TW-10 is in the 50th · 1,417 models

Forward Gears

▲ TW-10 higher · +8 (+100%)
D21 Series II8
TW-1016
Median Row Crop Tractor16

D21 Series II is in the 16th percentile; TW-10 is in the 50th · 1,200 models

D21 Series II (A)TW-10 (B)Median Row Crop Tractor

Full comparison

Every spec, side by side

General Information

SpecAllis Chalmers D21 Series IIFord TW-10Difference
ManufacturerAllis ChalmersFord—
ModelD21 Series IITW-10—
CategoryRow CropRow CropSame

Engine

SpecAllis Chalmers D21 Series IIFord TW-10Difference
ManufacturerAllis ChalmersFord—
Model3500Not recorded—
Power Output121hp123hp▲ TW-10+2 hp · +2%
Rated RPM2,200RPM2,300RPM▲ TW-10+100 RPM · +5%
Cylinders66Same
Displacement426ci401ci▲ D21 Series II+25 ci · +6%
Bore4.3in4.4in▲ TW-10+0.1 in · +2%
Stroke5in4.4in▲ D21 Series II+0.6 in · +14%

Transmission

SpecAllis Chalmers D21 Series IIFord TW-10Difference
TypeSliding gear with dry disc clutchDual Power with cerametallic disc clutch—

Dimensions & Weight

SpecAllis Chalmers D21 Series IIFord TW-10Difference
Length160in176in▲ TW-10+16 in · +10%
Width91.3in104in▲ TW-10+12.7 in · +14%
Height106in113in▲ TW-10+7 in · +7%
Operating Weight9,502lb12,865lb▲ TW-10+3,363 lb · +35%

Hydraulics

SpecAllis Chalmers D21 Series IIFord TW-10Difference
System TypeNot recordedOpen center—
Steering TypePowerHydrostatic power—

Power Take-off (PTO)

SpecAllis Chalmers D21 Series IIFord TW-10Difference
TypeIndependentIndependentSame
Speed 11,000rpm540rpm▲ D21 Series II+460 rpm · +85%
Speed 2Not recorded1,000rpm—

Hitch & Towing

SpecAllis Chalmers D21 Series IIFord TW-10Difference
Hitch TypeThree-Point HitchThree-Point HitchSame
Hitch CategoryIII/IIII—
Hitch PositionRearRearSame
Hitch CapacityNot recorded5,998lb—

Chassis & Drive

SpecAllis Chalmers D21 Series IIFord TW-10Difference
Chassis Type4x2 2WD4x2 2WDSame
Drive Type2WD2WDSame
Steering TypePowerHydrostatic power—
Brake TypeBand actuated discDifferential hydraulic wet discs—

Electrical

SpecAllis Chalmers D21 Series IIFord TW-10Difference
Starter TypeElectricElectricSame

Capacities

SpecAllis Chalmers D21 Series IIFord TW-10Difference
Coolant7.8gal5.3gal▲ D21 Series II+2.5 gal · +47%

Operator Station

SpecAllis Chalmers D21 Series IIFord TW-10Difference
TypeOpenOpen operator station with ROPS—

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 · 51st percentile (401 ci)

Cylinders

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

Forward Gears

median 16
A · 16th percentile (8)B · 50th percentile (16)

Operating Weight

median 12,307 lb
A · 28th percentile (9,502 lb)B · 54th percentile (12,865 lb)
A · D21 Series IIB · TW-10Median Row Crop Tractor
Full spec pageAllis Chalmers D21 Series IIFull spec pageFord TW-10