Fiat 666
The Fiat 666 is a tractor produced by Fiat. It is equipped with a 210.9 ci 3.5 L engine. The listed engine power is Diesel (listed): 68 hp / 50.7 kW. Transmission: 12 forward and 4 reverse. Operating weight: 6700 to 7275 pounds.
Engine Power
Diesel (listed): 68 hp / 50.7 kW
Fuel & Capacities
19.2 gal
72.7 L
Transmission
12 forward and 4 reverse
Operating Weight
6700 to 7275 pounds
Overview
 | 1982 - 1986
66 SeriesUtility tractor
66 Series
Utility tractor |
|---|
Production | |
|---|---|
Manufacturer | Fiat |
Utility tractor | |
Variants | |
|---|---|
666 | 2WD |
666DT | 4WD |
Fiat 666 Engine | |
|---|---|
Fiat 3.5L 4-cyl diesel | |
Fuel tank | 19.2 gal
72.7 L |
Engine details ...  | |
Fiat 666 Transmission | |
|---|---|
12-speed | |
Transmission details ...  |
Fiat 666 Power | |
|---|---|
Engine | 68 hp
50.7 kW |
Mechanical | |
|---|---|
Two- or four-wheel drive | |
Power steering ((Four-wheel drive models.)) | |
Wet disc brakes | |
Cab standard. |
Hydraulics | |
|---|---|
Pump flow | 8.9 gpm
33.7 lpm |
Tractor hitch | |
|---|---|
Rear Type | II |
Rear lift | 6922 lbs
3139 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO Type | 540/1000 |
Dimensions & Tires | |
|---|---|
2WD Wheelbase | 90.6 inches
230 cm |
4WD Wheelbase | 88.6 inches
225 cm |
Weight | 6700 to 7275 pounds |
Front tire | 7.50-16 |
2WD Rear tire | 16.9-30 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Battery volts | 12 |
Engine
Engine Detail — 210.9 ci / 3.5 L Diesel
Manufacturer | Fiat 8045.02 |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 210.9 ci
3.5 L |
Bore/Stroke | 3.93x4.33 inches
100 x 110 mm |
Power | 68 hp
50.7 kW |
Rated RPM | 2500 |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission — 12 forward and 4 reverse
Gears | 12 forward and 4 reverse |
Dimensions
Fiat 666 Tires | |
|---|---|
2WD Standard tires (ag) | Front: 7.50-16. Rear: 16.9-30 |
4WD Standard tires (ag) | Front: 11.2-24. Rear: 16.9-30 |
Dimensions | |
|---|---|
2WD Wheelbase | 90.6 inches
230 cm |
4WD Wheelbase | 88.6 inches
225 cm |
Length | 155 inches
393 cm |
2WD Weight | 6700 lbs
3039 kg |
4WD Weight | 7275 lbs
3299 kg |
Photos
Fiat 666 tractor photo
Recommended Implements & Sizing Guide
Engineering recommendations for Fiat 666 based on its 68 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 3 to 4 Bottom (16")3 - 4 铧 (40 cm) | Heavy Duty | Suitable for medium loam and stubble turnover. |
Rotary Cutter / MowerMowing & Clearing | 7 to 8 ft (84-96 in)2.1 - 2.4 m | Heavy Duty | Heavy-duty twin spindle cutter for overgrown acreage. |
Rotary TillerSeedbed Prep | 78 to 84 in200 - 215 cm | Heavy Duty | Heavy commercial tiller with multi-speed gearbox. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | 4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机 | Heavy Duty | Silage and dry hay; 540 RPM PTO with slip-clutch. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Fiat 666.
Estimated Continuous Field Runtime: 5.4 hrs
Approximately 5.4 hours of continuous field operation at ~75% rated power on a full tank (19.2 gal / 72.7 L).
Estimated 75% Load Fuel Burn~3.5 gal/hr (13.4 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Fiat 666 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Fiat 666.
Converted Equivalents:
Horsepower (HP)68 hp
Kilowatts (kW)50.7 kW
Metric Horsepower (PS / CV)68.9 PS
Direct Competitor Comparison
Compare Fiat 666 against same-era industry alternatives in the same horsepower class.
Current Model
Fiat
Fiat 666
Engine Power:Diesel (listed): 68 hp / 50.7 kW
★ Baseline Reference
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