WhichTractor
  • WhichTractor size: Standard-size
  • No lab test on file
  • 1971–1976
  • 54,947 built

It sits on the standard-size/high-power boundary, so either size is a fair description. WhichTractor size, not the maker’s category

International Harvester Farmall 1066 Engine specs

9 engine values on record for the Farmall 1066.

Engine power, claimed · gross or net not stated

115.5 hp

86.1 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “IHC 1066”, claimed

This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.

What engine is in a Farmall 1066?

A Farmall 1066 has a INTERNATIONAL HARVESTER DT-414, a 6-cylinder 6.78 L diesel engine.

Engine — INTERNATIONAL HARVESTER DT-414 specifications
Make & modelINTERNATIONAL HARVESTER DT-414
FuelDiesel
Cylinders6
Displacement413.9 ci · 6.78 L
CoolingLiquid-cooledSource 1
Air cleanerdry air filter
Cylinders6Source 1
Displacement7.2 qt · 6.8 LSource 1
Bore4.3 in · 109.22 mmSource 1
Stroke4.8 in · 120.65 mm
Rated engine speed2,400–2,600 rpmthe article lists alternatives

Source · Traktorenlexikon, “IHC 1066”

Sources and how this page was built

9 engine values from Traktorenlexikon, “IHC 1066”; and Traktorenlexikon, “Farmall Farmall 1066”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: Farmall Farmall 1066 — CC BY-SA 4.0, WIKIBOOKS-TL-118877 · revision 1054932. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: IHC 1066 — CC BY-SA 4.0, WIKIBOOKS-TL-118876 · revision 1055406. Wikibooks contributors (Traktorenlexikon). Original document