Steiger Serie-II
1 model in this series
Turbo Tiger II ST-320 (Serie-II series) by Steiger: eight-cylinder Cummins diesel engine rated at 239 kW (320 hp), built in 1974 and 1975.
Steiger was one of the American pioneers of the articulated four-wheel-drive tractor with four equally sized wheels, a concept that emerged from the 1960s onward in farming across the American Midwest and the Canadian prairies. Production was based in North Dakota, and the Serie-II generation was among the first to establish this layout in the market.
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The Turbo Tiger II ST-320 is powered by an eight-cylinder Cummins diesel engine of 14,800 cm³ displacement, delivering 239 kW (320 hp) at 2,300 rpm. At an unladen weight of 12,500 kg, the tractor ranked among the heaviest and most powerful field tractors of the 1970s, far beyond the single-axle standard tractors common at the time. That works out to roughly 52 kg of weight per kW, a figure typical of articulated four-wheel-drive tractors of that era.
Drive to four equally sized wheels and an articulation joint in the frame, instead of a conventional steered front axle, defined this vehicle class. It delivered high drawbar force at high pulling power, needed for towing wide cultivators and seeding equipment across large fields.
On a used eight-cylinder machine of this generation, it is worth checking the turbocharger and intake ducting, looking for leaks at the articulation joint and its bearings, and inspecting the four-wheel-drive gearboxes, since decades of field work leave their marks exactly on these components.
Sources: SpecCodex-Register: Kennwerte des Modells Turbo Tiger II ST-320
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