Compare/Fiat 55-46 vs Fiat 56-66S

Fiat 55-46 vs Fiat 56-66S

Verdict: Fiat 55-46 vs Fiat 56-66S

The Fiat 55-46 and the Fiat 56-66S are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 54 hp. Fiat 55-46 is the lighter machine (4,431 kg vs 4,685 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Fiat 56-66S is the newer design (1992 vs 1984). 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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Acreage600 acBudgetMain crop / use

Fit & specs

Fiat

Fit score

Best match

Clear

Fiat

Fit score

Best match

Clear

Rated power

54 hp

Confidence

40%

Guide price

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Overview

Manufacturer

FiatReference

With 14.9/13-28 rear tires.Reference

liquid-cooledReference

Variants

55-46DT

4WDReference

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Engine

40.4 kWReference

40.5 kWReference

Displacement

2.7 LReference

Bore/Stroke

100 x 115 mmReference

Power

40.4 kWReference

40.5 kWReference

Compression

17:1Reference

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Rated RPM

2500Reference

Firing order

1-2-3Reference

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Starter

electricReference

Starter volts

12Reference

Transmission

Gears

12 forward and 3 reverseReference

20 forward and 8 reverseReference

Clutch

279.4mm dry discReference

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PTO & Hydraulics

Type

creeperReference

Pressure

190.0 barReference

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Valves

0 to 2Reference

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Pump flow

26.5 lpmReference

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Rear Type

II/IReference

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Rear lift (at ends)

1920 kgReference

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Rear lift (at 24"/610mm)

1579 kgReference

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Rear PTO

independentReference

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Rear PTO Type

540 (1.375)Reference

540/1000Reference

Engine RPM

540@2160Reference

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Rear lift

—

2125 kgReference

Dimensions

2WD Wheelbase

205 cmReference

199 cmReference

4WD Wheelbase

201 cmReference

190 cmReference

Weight

4431 to 4894 poundsReference

4685 to 5236 poundsReference

Front tire

6.00-16Reference

5.50-16Reference

2WD Rear tire

14.9/13-28Reference

12.4/11-28Reference

2WD Standard tires (ag)

Front: 6.00-16. Rear: 14.9/13-28Reference

Front: 5.50-16. Rear: 12.4/11-28Reference

4WD Standard tires (ag)

Front: 11.2/10-20. Rear: 14.9/13-28Reference

Front: 7.50-20. Rear: 12.4/11-28Reference

2WD Optional tires (ag)

Front: 7.50-16. Rear: 12.4/11-32Reference

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4WD Optional tires (ag)

Front: 11.2/10-20. Rear: 12.4/11-32Reference

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2WD Length

320 cmReference

297 cmReference

4WD Length

327 cmReference

296 cmReference

2WD Ground clearance

49 cmReference

44 cmReference

4WD Ground clearance

32 cmReference

33 cmReference

2WD

2009 kgReference

—

4WD

2219 kgReference

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2WD Ballasted

2750 kgReference

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4WD Ballasted

2960 kgReference

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2WD Weight

—

2125 kgReference

4WD Weight

—

2375 kgReference

2WD Front tread

—

130 to 180 cmReference

4WD Front tread

—

138 to 181 cmReference

Rear tread

—

120 to 180 cmReference

Steering wheel

—

145 cmReference

55-46 Serial Numbers

Location:

Serial number on the left side of the 55-46, behind the rear axle.Reference

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Electrical

Ground

negativeReference

Charging system

alternatorReference

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Charging amps

33Reference

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Battery volts

12Reference

Fiat 55-46 Height

2WD Hood

142 cmReference

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4WD Hood

141 cmReference

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ROPS

229 cmReference

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Exhaust

235 cmReference

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Speeds

Fiat 56-66S Height

Hood

—

127 cmReference

Cab

—

224 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.