Compare/Oliver OC-4 vs Oliver Super 66

Oliver OC-4 vs Oliver Super 66

Verdict: Oliver OC-4 vs Oliver Super 66

The Oliver OC-4 and the Oliver Super 66 are both tractors — here is how they stack up on the figures that matter. Oliver Super 66 leads on rated power with 33 hp against 30 hp. Oliver Super 66 is the lighter machine (3,943 kg vs 4,720 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Oliver OC-4 is the newer design (1957 vs 1954). In short: choose the Oliver Super 66 for outright pulling power, or the Oliver OC-4 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

Oliver

Fit score

Best match

Clear

Oliver

Fit score

Best match

Clear

Rated power

30 hp

33 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

OliverReference

Gasoline 4-speed crawlerJune 5 - 16, 1958Link: Nebraska Tractor Test 656 fileReference

Diesel 6-speed 2WDMay 19 - 26, 1955Link: Nebraska Tractor Test 544 fileReference

Drive

crawlerReference

—

Steering

—

power optionalReference

Variants

OC-4

crawlerReference

—

OC-46

loader-crawlerReference

—

Alfta

flex-trackReference

—

Engine

Fuel tank

41.6 LReference

—

Engine

22.7 kWReference

—

Gas Drawbar (claimed)

17.9 kWReference

—

Diesel Drawbar (claimed)

18.5 kWReference

—

Gas Belt (claimed)

19.7 kWReference

—

Diesel Belt (claimed)

20.4 kWReference

—

Drawbar (tested)

18.0 kWReference

20.9 kWReference

Belt (tested)

19.4 kWReference

25.1 kWReference

Displacement

2.1 LReference

2.4 LReference

Bore/Stroke

89 x 114 mmReference

89 x 95 mmReference

Power

22.5 kWReference

—

Air cleaner

oil bathReference

Compression

6.5:1Reference

16:1Reference

Rated RPM

1700Reference

2000Reference

Torque

131.5 NmReference

—

Torque RPM

1400Reference

—

Starter volts

6Reference

12Reference

Oil capacity

5.4 LReference

—

Coolant capacity

11.4 LReference

—

Belt power (max)

18.9 kWReference

25.1 kWReference

Max power

17.3 kWReference

20.5 kWReference

Drawbar (claimed)

—

16.6 kWReference

Firing order

—

1-2-4-3Reference

Transmission

Type

gearReference

unsynchronized gearReference

Gears

4 forward and 1 reverseReference

6 forward and 2 reverseReference

Clutch

dry discReference

PTO & Hydraulics

Rear PTO Type

540 (1.375)Reference

PTO (claimed)

—

24.5 kWReference

Rear Type

—

optionalReference

Rear PTO

—

independentReference

Dimensions

Weight

4720 to 5000 poundsReference

3943 to 4050 poundsReference

Length

281 cmReference

—

Gauge

172 cmReference

—

Gas Shipping

2140 kgReference

—

Diesel Shipping

2154 kgReference

—

Gas Operating

2254 kgReference

—

Diesel Operating

2268 kgReference

—

Front tire

—

5.00-15Reference

Rear tire

—

10-38Reference

Ag front

—

5.00-15Reference

Ag rear

—

10-38Reference

Gas Operating weight

—

1788 kgReference

Diesel Operating weight

—

1837 kgReference

Oliver OC-4 Tracks

Width

152 cmReference

—

Length on ground

142 cmReference

—

Area on ground

0.9 m²Reference

—

Test results

Belt fuel use (max)

9.5 l/hourReference

9.1 l/hourReference

Max pull

2261 kgReference

1992 kgReference

Super 66 Serial Numbers

1954

—

7085Reference

1955

—

14099Reference

1956

—

39371Reference

1957

—

45846Reference

1958

—

57858Reference

Location:

—

Serial number plate below the dashboard.Reference

Questions

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.