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Ford 641 vs Ford 671
Verdict: Ford 641 vs Ford 671
The Ford 641 and the Ford 671 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 48 hp. Ford 641 is the lighter machine (1,492 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
LP gasReference
Steering
power assist optionalReference
power assist optionalReference
Original price
—
$3,222 (1961)Reference
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
Drawbar (tested)
22.2 kWReference
—
Belt (tested)
25.1 kWReference
—
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
5.7 LReference
7.6 LReference
Oil change
100 hReference
100 hReference
Belt power (max)
25.1 kWReference
—
Max power
21.9 kWReference
—
Power at rated engine speed
23.7 kWReference
—
Transmission
Gears
12 forward and 3 reverseReference
10 forward and 2 reverseReference
Clutch
dry discReference
—
Oil type
SAE 80 Mild EPReference
M2C41Reference
Transmission
—
Select-O-SpeedReference
PTO & Hydraulics
PTO (tested)
23.7 kWReference
—
Hydraulic system
7.6 LReference
7.6 LReference
Type
unsynchronized gearReference
full power shiftReference
Capacity
7.6 LReference
7.6 LReference
Total flow
15.1 lpmReference
15.1 lpmReference
Rear Type
IReference
IReference
Control
position and draft controlReference
—
Rear lift
567 kgReference
567 kgReference
Rear PTO
transmissionReference
independentReference
Rear PTO Type
540 (1.375)Reference
540Reference
Power at rated PTO speed
18.9 kWReference
—
Capacities
Fuel
49.2 LReference
49.2 LReference
Rear axle
7.6 LReference
7.6 LReference
Dimensions
Weight
1492 kgReference
1506 kgReference
Front tire
5.50-16Reference
5.50-16Reference
Rear tire
11-28Reference
11-28Reference
Ag front
5.50-16Reference
5.50-16Reference
Ag rear
11-28Reference
11-28Reference
Operating weight
1492 kgReference
—
Ballasted weight
2505 kgReference
—
Front tread
132 to 203 cmReference
132 to 203 cmReference
Rear tread
132 to 193 cmReference
132 to 193 cmReference
Ford 641 attachments
641 Serial Number Location
641 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
Attachment overview
Test results
Belt fuel use (max)
12.9 l/hourReference
—
Max pull
1918 kgReference
—
Fuel use
8.7 l/hourReference
—
671 Serial Numbers
Location:
—
Transmission case, top left, behind the starter.Reference
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.