100 - 140 HP Classic DuelVerified Specifications Duel
John Deere 4020 vs International Harvester 1066
Classic Row-Crop Showdown: Waterloo New Generation vs Farmall Turbo Torque
International Harvester
Catalog Archive1066
Rated Power
140 HP
Displacement
6.8 L
Weight
N/A
Comparative Engineering Analysis
Key mechanical takeaways distilled from factory technical manuals and Nebraska Tractor Test Laboratory records.
Deere 4020 features Waterloo 6.6L naturally aspirated diesel vs IH 1066 turbocharged 6.8L DT-414
IH 1066 delivers higher factory PTO rating (140 HP vs 95 HP) for heavy primary tillage
Deere Syncro-Range or 8-speed PowerShift vs IH 16-speed with on-the-go Torque Amplifier (TA)
Both machines represent the pinnacle of 1960s–1970s North American farm mechanization
Comprehensive Specification Matrix
| Specification | Deere 4020 | International Harvester 1066 |
|---|---|---|
| Manufacturer / Brand | Deere | International Harvester |
| Production Years | 1963–1972 | 1971–1976 |
| Engine Model | John Deere | International Harvester DT414 |
| Cylinders & Fuel | 6-cyl • Gasoline | 6-cyl • Diesel |
| Rated Engine Horsepower | 101 HP | 140 HP |
| Engine Displacement | 5.9 L | 6.8 L |
| Transmission Type | partially synchronized | gear |
| Hydraulic Total Flow | 18 GPM | 21 GPM |
| Shipping / Operating Weight | N/A | N/A |
| Wheelbase & Chassis | 100.25 in • 2WD | 105 in • 4WD |
| Nebraska Test & Provenance | OEM Archival | OEM Archival |
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