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Allis Chalmers 620 vs Allis Chalmers 720
Verdict: Allis Chalmers 620 vs Allis Chalmers 720
The Allis Chalmers 620 and the Allis Chalmers 720 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 20 hp. Allis Chalmers 620 is the lighter machine (589 kg vs 1,235 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Allis Chalmers 720 is the newer design (1975 vs 1973). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.
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Fit & specs
Allis Chalmers
62
Fit score
Best match
Clear
Allis Chalmers
62
Fit score
Best match
Clear
Rated power
20 hp
20 hp
Confidence
40%
40%
Guide price
—
—
Overview
Distributor
Allis ChalmersReference
Allis ChalmersReference
Manufacturer
SundstrandReference
SundstrandReference
air-cooled horizontal-shaft opposed-twinReference
With 29x12.00-15 R3 tires.Reference
Final drives
—
spur gearReference
Variants
4041
similar Simplicity modelReference
—
9020
—
similar Simplicity modelReference
720 Special
—
economy model with no 3-point or rear PTOReference
Engine
Displacement
49.8 ciReference
49.8 ciReference
Bore/Stroke
83 x 76 mmReference
83 x 76 mmReference
Power (gross)
14.5 kWReference
14.5 kWReference
Air cleaner
paper elementReference
paper elementReference
Compression
7:1Reference
7:1Reference
Rated RPM
3600Reference
3600Reference
Starter volts
12Reference
12Reference
Oil capacity
3.3 LReference
5.7 LReference
Transmission
Gears
infinite forward and reverse (3-range)Reference
infinite forward and reverse (3-range)Reference
Capacities
Fuel
14.4 LReference
14.4 LReference
PTO & Hydraulics
Hydraulic system
4.7 LReference
5.7 LReference
Capacity
4.7 LReference
5.7 LReference
Pressure
34.5 barReference
34.5 barReference
Pump flow
8.5 lpmReference
9.5 lpmReference
Rear Type
0Reference
0Reference
Rear PTO
independentReference
independentReference
Clutch
electricReference
electricReference
Rear PTO Type
2000Reference
2000Reference
Front PTO
independentReference
independentReference
Front PTO Type
3600Reference
3600Reference
Dimensions
Wheelbase
142 cmReference
142 cmReference
Weight
589 kgReference
419 kgReference
Front tire
20x8-10Reference
20x8.00-10Reference
Rear tire
29x12.50-15Reference
29x12.00-15Reference
Ag front
4.00x12Reference
4.00x12Reference
Ag rear
8x16Reference
8.00-16Reference
Lawn/turf front
20x8-10Reference
6.90/6.00-9Reference
Lawn/turf rear
29x12.50-15Reference
31x15.50-15Reference
Length
210 cmReference
210 cmReference
Width
121 cmReference
121 cmReference
Height
109 cmReference
109 cmReference
Shipping weight
589 kgReference
—
Ground clearance
38 cmReference
38 cmReference
Shipping
—
589 kgReference
Operating
—
671 kgReference
Allis Chalmers 620 attachments
620 Serial Numbers
Location:
Serial number decal on the right side of the tractor frame, above the foot rest.Reference
—
Electrical
Ground
negativeReference
negativeReference
Charging amps
20Reference
20Reference
Battery volts
12Reference
12Reference
Charging system
—
flywheel magnetoReference
Battery AH
—
53Reference
Attachment overview
60" Mower deck
Type
hydrostaticReference
hydrostaticReference
Cutting width
152 cmReference
152 cmReference
Cut height
4 to 7 cmReference
—
Allis Chalmers 720 attachments
720 Serial Number Location
Brantly LD6 Backhoe
Backhoe type
—
Brantly LD6 BackhoeReference
Transport height
—
182 cmReference
Bucket width
—
40 cmReference
2-Foot flat digging depth
—
182 cmReference
Reach from pivot
—
274 cmReference
Swing Arc
—
135°Reference
Bucket force
—
1360 kgReference
Dipperstick force
—
707 kgReference
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.