Compare/Hesston 666 vs Hesston 70-90

Hesston 666 vs Hesston 70-90

Verdict: Hesston 666 vs Hesston 70-90

The Hesston 666 and the Hesston 70-90 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 62 hp. Hesston 666 is the lighter machine (5,689 kg vs 6,798 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Hesston 70-90 holds more fuel (79.9 L vs 72.7 L) for longer stints between fills. Hesston 70-90 is the newer design (1985 vs 1983). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Hesston

Fit score

Best match

Clear

Hesston

Fit score

Best match

Clear

Rated power

62 hp

Confidence

40%

Guide price

—

Overview

Distributor

HesstonReference

Manufacturer

FiatReference

Four synchronized gears in three ranges.Reference

With 18.4-30 rear tires.Reference

Original price

$19,600 (1984)Reference

—

Steering

hydrostatic powerReference

—

Final drives

—

planetaryReference

Differential lock

—

mechanical rearReference

Variants

666

similar Fiat modelReference

—

666DT

4WDReference

—

666HC

high-cropReference

—

70-90DT

—

4WDReference

Engine

Fuel tank

72.7 LReference

79.9 LReference

Drawbar (claimed)

40.5 kWReference

—

Drawbar (tested)

39.6 kWReference

40.2 kWReference

Displacement

3.5 LReference

3.6 LReference

Bore/Stroke

100 x 110 mmReference

100 x 115 mmReference

Starter volts

12Reference

Power at rated engine speed

46.5 kWReference

46.4 kWReference

Max power

39.6 kWReference

40.2 kWReference

Engine

—

52.2 kWReference

Power

—

52.2 kWReference

Fuel system

—

direct injectionReference

Pre-heating

—

ether injectionReference

Compression

—

17:1Reference

Rated RPM

—

2500Reference

Starter

—

electricReference

Transmission

Gears

20 forward and 8 reverseReference

Clutch

—

279.4mm dry discReference

PTO & Hydraulics

PTO (claimed)

46.2 kWReference

PTO (tested)

46.5 kWReference

46.4 kWReference

Type

creeperReference

Pressure

186.2 barReference

186.3 barReference

Valves

1 or 2Reference

—

Pump flow

41.6 lpmReference

Rear Type

I/IIReference

IIReference

Rear PTO

independentReference

Rear PTO Type

540Reference

540 (1.375)Reference

Power at rated PTO speed

45.0 kWReference

46.2 kWReference

Rear valves

—

2 or 3Reference

Rear lift

—

2364 kgReference

Engine RPM

—

540@2198Reference

Dimensions

Wheelbase

224 cmReference

—

Weight

5689 to 6350 poundsReference

6798 to 7436 poundsReference

Front tire

7.50-16Reference

Rear tire

14.9-30Reference

16.9-30Reference

Ag front

9.5-24 (4WD)Reference

—

Ag rear

14.9-30Reference

13.6-38Reference

Length

363 cmReference

—

Operating weight

2880 kgReference

—

Ground clearance

40 cmReference

—

2WD Wheelbase

—

226 cmReference

4WD Wheelbase

—

227 cmReference

2WD Ag front

—

9.5L-15Reference

4WD Ag front

—

12.4-24Reference

2WD Length

—

343 cmReference

4WD Length

—

356 cmReference

2WD Front tread

—

140 to 191 cmReference

4WD Front tread

—

162 to 195 cmReference

Rear tread

—

139 to 200 cmReference

2WD

—

3083 kgReference

4WD

—

3372 kgReference

Operating

—

3220 kgReference

Ballasted

—

3526 kgReference

Electrical

Charging system

alternatorReference

Charging amps

33Reference

65Reference

Ground

—

negativeReference

Battery volts

—

12Reference

Hesston 666 Height

Hood

149 cmReference

—

Exhaust

246 cmReference

—

Test results

Fuel use

13.2 l/hourReference

14.4 l/hourReference

Max pull

—

2829 kgReference

Hesston 70-90 Height

2WD Hood

—

147 cmReference

4WD Hood

—

163 cmReference

ROPS

—

257 cmReference

Cab

—

252 cmReference

Speeds

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.