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Ford 621 vs Ford 681
Verdict: Ford 621 vs Ford 681
The Ford 621 and the Ford 681 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 48 hp. Ford 681 is the lighter machine (1,496 kg vs 1,506 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. 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
Ford
62
Fit score
Best match
Clear
Ford
62
Fit score
Best match
Clear
Rated power
48 hp
48 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
FordReference
FordReference
The 12-speed adds a mechanical over/under to the basic four-speed transmission.Reference
Diesel Select-O-Speed 2WDJune 20 - 26, 1959Link: Nebraska Tractor Test 706 fileReference
Steering
power assist optionalReference
power assist optionalReference
Variants
611
Select-O-Speed, no PTOReference
Select-O-Speed, no PTOReference
621
Four-speed, no PTO or 3-pointReference
Four-speed, no PTO or 3-pointReference
631
Four-speed, no PTOReference
Four-speed, no PTOReference
641
Four-speedReference
Four-speedReference
651
Five-speedReference
Five-speedReference
661
Five-speed, live PTOReference
Five-speed, live PTOReference
671
Select-O-SpeedReference
Select-O-SpeedReference
681
Select-O-Speed, dual-speed PTOReference
Select-O-Speed, dual-speed PTOReference
Engine
Engine (gross)
36.1 kWReference
36.1 kWReference
Belt (claimed)
23.9 kWReference
23.9 kWReference
Plows
2 (14-inch)Reference
2 (14-inch)Reference
Displacement
2.4 LReference
2.4 LReference
Bore/Stroke
90 x 91 mmReference
90 x 91 mmReference
Emissions
Tier 0Reference
Tier 0Reference
Power (gross)
31.8 kWReference
31.8 kWReference
Air cleaner
oil bathReference
oil bathReference
Compression
16.8:1Reference
16.8:1Reference
Rated RPM
2200Reference
2200Reference
Torque
171.9 NmReference
171.9 NmReference
Torque RPM
1600Reference
1600Reference
Firing order
1-2-4-3Reference
1-2-4-3Reference
Starter volts
12Reference
12Reference
Coolant capacity
14.2 LReference
14.2 LReference
Sparkplug
14MMReference
14MMReference
Sparkplug gap
0.711 mmReference
0.711 mmReference
Oil capacity
7.6 LReference
7.6 LReference
Oil change
100 hReference
100 hReference
Drawbar (tested)
—
20.0 kWReference
Power at rated engine speed
—
23.5 kWReference
Max power
—
19.0 kWReference
Transmission
Type
unsynchronized gearReference
full power shiftReference
Gears
12 forward and 3 reverseReference
10 forward and 2 reverseReference
Clutch
dry discReference
hydraulic wet discReference
Oil type
SAE 80 Mild EPReference
M2C41Reference
Transmission
—
Ford Select-O-SpeedReference
Capacities
Fuel
49.2 LReference
49.2 LReference
Rear axle
7.6 LReference
7.6 LReference
Dimensions
Weight
1506 kgReference
1496 kgReference
Front tire
5.50-16Reference
6.00-16Reference
Rear tire
10-28Reference
11-28Reference
Ag front
5.50-16Reference
6.00-16Reference
Ag rear
11-28Reference
11-28Reference
Rear tread
121 to 193 cmReference
132 to 193 cmReference
Operating weight
—
1496 kgReference
Ballasted weight
—
2472 kgReference
Front tread
—
132 to 203 cmReference
621 Serial Number Location
621 Serial Numbers
1957
1001Reference
1001Reference
1958
11977Reference
11977Reference
1959
58312Reference
58312Reference
1960
105943Reference
105943Reference
1961
131427Reference
131427Reference
1962
155531Reference
155531Reference
Electrical
Ground
negative (12V)Reference
negative (12V)Reference
Charging system
generatorReference
generatorReference
Charging amps
20Reference
20Reference
Battery volts
12 (diesel)Reference
12 (diesel)Reference
Battery AH
135 (12V)Reference
135 (12V)Reference
PTO & Hydraulics
PTO (tested)
—
25.6 kWReference
Hydraulic system
—
7.6 LReference
Capacity
—
7.6 LReference
Total flow
—
15.1 lpmReference
Rear Type
—
IReference
Rear lift
—
567 kgReference
Rear PTO
—
independentReference
Rear PTO Type
—
540/1000Reference
Power at rated PTO speed
—
19.6 kWReference
681 Serial Numbers
Location:
—
Transmission case, top left, behind the starter.Reference
Test results
Fuel use
—
8.3 l/hourReference
Max pull
—
1895 kgReference
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.