Compare/Fiat 666 vs Fiat 680

Fiat 666 vs Fiat 680

Verdict: Fiat 666 vs Fiat 680

The Fiat 666 and the Fiat 680 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 68 hp. Fiat 680 is the lighter machine (5,513 kg vs 6,700 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Fiat 680 holds more fuel (79.9 L vs 72.7 L) for longer stints between fills. Fiat 666 is the newer design (1982 vs 1978). 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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Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Fiat

Fit score

Best match

Clear

Fiat

Fit score

Best match

Clear

Rated power

68 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

FiatReference

With 18.4/15-30 rear tires.Reference

Four gears (1-4) plus reverse (R) in four ranges (creeper/low/intermediate/high).Reference

Final drives

spur gearReference

—

Differential lock

mechanical rearReference

—

Trailer brakes

hydraulicReference

—

Variants

666

similar Hesston modelReference

—

680

—

2WDReference

666DT

4WDReference

—

680DT

—

4WDReference

Engine

Fuel tank

72.7 LReference

79.9 LReference

Engine

50.7 kWReference

Displacement

3.5 LReference

Bore/Stroke

100 x 110 mmReference

Power

50.7 kWReference

Pre-heating

thermostartReference

—

Rated RPM

2500Reference

Starter

electricReference

—

Starter volts

12Reference

Oil capacity

44.8 LReference

—

Compression

—

17:1Reference

Firing order

—

1-3-4-2Reference

Transmission

Gears

20 forward and 8 reverseReference

16 forward and 4 reverseReference

Clutch

dry discReference

—

PTO & Hydraulics

Type

creeperReference

Pump flow

33.7 lpmReference

Rear Type

II/IReference

IIReference

Control

position and draft controlReference

—

Rear lift

3139 kgReference

2400 kgReference

Rear PTO

independentReference

Rear PTO Type

540/1000 (1.375)Reference

Engine RPM

—

1000@2410Reference

Dimensions

2WD Wheelbase

230 cmReference

228 cmReference

4WD Wheelbase

225 cmReference

227 cmReference

Weight

6700 to 7275 poundsReference

5513 to 6174 poundsReference

Front tire

7.50-16Reference

7.50-18Reference

2WD Rear tire

16.9-30Reference

13.6/12-38Reference

2WD Standard tires (ag)

Front: 7.50-16. Rear: 16.9-30Reference

Front: 7.50-18. Rear: 13.6/12-38Reference

4WD Standard tires (ag)

Front: 11.2-24. Rear: 16.9-30Reference

Front: 11.2/10-28. Rear: 13.6/12-38Reference

Ag front

7.50-20Reference

—

Ag rear

13.6/12-38Reference

—

Length

393 cmReference

—

2WD Weight

3039 kgReference

2500 kgReference

4WD Weight

3299 kgReference

2800 kgReference

2WD Front tread

139 to 189 cmReference

Rear tread

139 to 199 cmReference

Steering wheel

167 cmReference

—

Optional tires (ag)

—

Front: 11.2/10-24. Rear: 16.9/14-30Reference

2WD Length

—

350 cmReference

4WD Length

—

366 cmReference

2WD Clearance (front axle)

—

51 cmReference

4WD Clearance (front axle)

—

45 cmReference

4WD Front tread

—

152 to 195 cmReference

2WD Steering wheel

—

179 cmReference

4WD Steering wheel

—

180 cmReference

Electrical

Ground

negativeReference

Charging system

alternatorReference

Battery volts

12Reference

Battery AH

120Reference

—

Charging amps

—

33Reference

Fiat 666 Height

Hood

148 cmReference

—

ROPS

245 cmReference

—

Exhaust

241 cmReference

—

Speeds

Fiat 680 Height

2WD Hood

—

151 cmReference

4WD Hood

—

152 cmReference

Cab

—

255 cmReference

2WD Exhaust

—

255 cmReference

4WD Exhaust

—

257 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.