Compare/Allis Chalmers 7000 vs Allis Chalmers D21 Series I

Allis Chalmers 7000 vs Allis Chalmers D21 Series I

Verdict: Allis Chalmers 7000 vs Allis Chalmers D21 Series I

The Allis Chalmers 7000 and the Allis Chalmers D21 Series I are both tractors — here is how they stack up on the figures that matter. Allis Chalmers 7000 leads on rated power with 106 hp against 103 hp. Allis Chalmers D21 Series I is the lighter machine (4,309 kg vs 9,350 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 7000 is the newer design (1975 vs 1963). In short: choose the Allis Chalmers 7000 for outright pulling power, or the Allis Chalmers D21 Series I if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

Allis Chalmers

Fit score

Best match

Clear

Allis Chalmers

Fit score

Best match

Clear

Rated power

106 hp

103 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Allis ChalmersReference

Four forward gears and one reverse combined with three-range power shift between low, direct, and overdrve. The black-chassis Allis 7000 used a new hydraulic wet clutch and torque limiter. A combination clutch/inching pedal put the transmission into low range when depressed.Reference

With 18.4x34 rear tires.Reference

Total built

7,264Reference

1,129Reference

Original price

$24,860Reference

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Engine

Drawbar (claimed)

66.4 kWReference

69.4 kWReference

Drawbar (tested)

66.7 kWReference

69.4 kWReference

Displacement

4.9 LReference

7.0 LReference

Bore/Stroke

98 x 108 mmReference

108 x 127 mmReference

Air cleaner

dryReference

Compression

16.25:1Reference

16.0:1Reference

Rated RPM

2200Reference

Idle RPM

775-2465Reference

—

Firing order

1-5-3-6-2-4Reference

Starter volts

12Reference

—

Coolant capacity

21.3 LReference

19.9 LReference

Coolant change

2000 hReference

—

Intake valve clearance

0.381 mmReference

Exhaust valve clearance

0.381 mmReference

Oil capacity

24.6 LReference

87.1 LReference

Oil change

100 hReference

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Power at rated engine speed

79.4 kWReference

76.9 kWReference

Max power

66.7 kWReference

69.4 kWReference

Fuel tank

—

196.8 LReference

Engine

—

88.7 kWReference

Plows

—

7Reference

Power

—

88.7 kWReference

Transmission

Power DirectorReference

Gears

12 forward and 3 reverseReference

8 forward and 2 reverseReference

Clutch

7-inch wet discs (power shift)Reference

dry discReference

PTO & Hydraulics

PTO (claimed)

79.0 kWReference

76.8 kWReference

PTO (tested)

79.4 kWReference

76.9 kWReference

Hydraulic system

26.5 LReference

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Type

partial power shiftReference

sliding gearReference

Capacity

26.5 LReference

—

Valves

1Reference

—

Pump flow

79.5 lpmReference

—

Total flow

94.6 lpmReference

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Rear Type

IIReference

III/IIReference

Rear PTO

independentReference

Rear PTO Type

540/1000Reference

1000Reference

Engine RPM

1000@2200Reference

—

Power at rated PTO speed

78.9 kWReference

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Capacities

Fuel

140.0 LReference

—

Rear diff.

30.3 LReference

—

Dimensions

Wheelbase

269 cmReference

244 cmReference

Weight

9350 to 9550 poundsReference

4309 kgReference

Front tire

10.00-16Reference

7.50x20Reference

Rear tire

18.4x38Reference

18.4x34Reference

Ag front

11L-15Reference

11.00x16Reference

Ag rear

23.1-26Reference

24.5x32Reference

Length

464 cmReference

407 cmReference

Clearance (front axle)

60 cmReference

54 cmReference

Clearance (rear axle)

73 cmReference

67 cmReference

Rear axle

82 by 2946 mmReference

—

Front tread

157 to 218 cmReference

—

Rear tread

162 to 284 cmReference

—

Shipping

4241 kgReference

—

Operating

4331 kgReference

—

Ballasted

5706 kgReference

—

Steering wheel

223 cmReference

229 cmReference

Width

—

232 cmReference

Shipping weight

—

4309 kgReference

Ballasted weight

—

5307 kgReference

Allis Chalmers 7000 attachments

7000 Serial Numbers

1975

1001Reference

—

1976

1648Reference

—

1977

5036Reference

—

1978

6373Reference

—

1979

8963Reference

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Location:

Serial number stamped on the right rear of the Allis 7000 differential housing, near the right lift cylinder.Reference

Serial number on the left side of the Allis-Chalmers D21, stamped into the flange near the starter mounting.Reference

Final

9503Reference

4609 (Series II)Reference

Electrical

Ground

negativeReference

Batteries

2Reference

4Reference

Battery volts

12Reference

Battery AH

95Reference

Charging system

—

Delco-Remy generatorReference

Charging amps

—

32Reference

Allis Chalmers 7000 Height

Hood

175 cmReference

182 cmReference

Exhaust

287 cmReference

270 cmReference

Test results

Fuel use

25.4 l/hourReference

26.9 l/hourReference

Max pull

4493 kgReference

6731 kgReference

D21 Serial Numbers

1963

—

100 (Series I)Reference

1964

—

1417 (Series I)Reference

1965

—

2130 (Series II)Reference

1966

—

2408 (Series II)Reference

1967

—

2863 (Series II)Reference

1968

—

3777 (Series II)Reference

1969

—

4498 (Series II)Reference

Allis Chalmers D21 Height

Speeds

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.