Compare/UTB/Universal 643 vs UTB/Universal S640

UTB/Universal 643 vs UTB/Universal S640

Verdict: UTB/Universal 643 vs UTB/Universal S640

The UTB/Universal 643 and the UTB/Universal S640 are both tractors — here is how they stack up on the figures that matter. UTB/Universal S640 leads on rated power with 62 hp against 58 hp. UTB/Universal S640 is the lighter machine (3,039 kg vs 6,192 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. UTB/Universal 643 holds more fuel (62.1 L vs 54.1 L) for longer stints between fills. UTB/Universal 643 is the newer design (1988 vs 1983). In short: choose the UTB/Universal S640 for outright pulling power, or the UTB/Universal 643 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

UTB/Universal

Fit score

Best match

Clear

UTB/Universal

Fit score

Best match

Clear

Rated power

58 hp

62 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

UTB/UniversalReference

Optional creeper adds a third range to the basic transmission.Reference

liquid-cooledReference

Original price

$25,000 (2004)Reference

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Differential lock

mechanical rearReference

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Drive

—

crawlerReference

Variants

643DT

4WDReference

—

S640

—

standardReference

SM640

—

wide-trackReference

U640

—

wheeled tractorReference

Engine

Fuel tank

62.1 LReference

54.1 LReference

Engine

47.7 kWReference

48.5 kWReference

Displacement

3.2 LReference

3.6 LReference

Bore/Stroke

102 x 110 mmReference

Power

47.7 kWReference

48.5 kWReference

Fuel system

direct injectionReference

Air cleaner

oil bathReference

—

Compression

17:1Reference

Rated RPM

2400Reference

Torque

206.1 NmReference

221.0 NmReference

Torque RPM

1400Reference

Starter volts

12Reference

Starter power

3.5 kWReference

3.0 kWReference

Oil capacity

23.0 LReference

—

Coolant capacity

14.0 LReference

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Starter

—

electricReference

Transmission

Gears

8 forward and reverseReference

6 forward and 2 reverseReference

Clutch

dry discReference

254mm dry discsReference

PTO & Hydraulics

PTO (claimed)

43.3 kWReference

46.2 kWReference

Type

shuttleReference

constant meshReference

Pressure

150.0 barReference

170.7 barReference

Valves

1Reference

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Pump flow

34.1 lpmReference

22.0 lpmReference

Rear Type

IIReference

II/IReference

Control

position and draft controlReference

—

Rear lift

2100 kgReference

1297 kgReference

Rear PTO

independentReference

—

Rear PTO Type

540/1000Reference

540Reference

Engine RPM

1000@2400Reference

540@1970Reference

Dimensions

Wheelbase

227 cmReference

152 cmReference

Weight

6192 to 6889 poundsReference

3039 kgReference

Front tire

6.00-16Reference

—

2WD Rear tire

14.9R-28Reference

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2WD Standard tires (ag)

Front: 6.00-16. Rear: 14.9R-28Reference

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4WD Standard tires (ag)

Front: 9.5/8-24. Rear: 12.4R-36Reference

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Length

378 cmReference

314 cmReference

Height

255 cmReference

—

2WD Weight

2808 kgReference

—

4WD Weight

3124 kgReference

—

2WD Front tread

139 to 199 cmReference

—

4WD Front tread

137 to 157 cmReference

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Rear tread

140 to 191 cmReference

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Electrical

Ground

negativeReference

—

Charging system

alternatorReference

Battery volts

12Reference

Battery AH

150Reference

—

Speeds

UTB/Universal S640 attachments

UTB/Universal S640 Tracks

S640 width

—

30 cmReference

SM640 width

—

36 cmReference

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.