With the New Holland TG series, there were hardly any similarities to its predecessor, the 70/G series, because it was developed based on the Case IH Magnum. The engines used were 8.3-liter Case Cummings. Of the three models, the two more powerful ones featured four-valve technology and an electronically controlled fuel injection pump. Torque increase was claimed to be as much as 50–54%. Slightly more power could be extracted from the engines when sufficient power was delivered through the PTO or when using road gears. The engine was not part of the load-bearing structure but sat on top of a subframe.

The drivetrain was taken directly from the Magnum. The powershift transmission, called Ultra Command, had 18 forward and 4 reverse speeds. Direction changes were hydraulic. As with the smaller NH series, the transmission had separate shift automation for field work and for road driving. Hydraulic output was 146 l/min, and with the optional MegaFlow pump, 257 l/min. Lifting capacity ranged from 9,000 to 10,000 kg. Front-axle options included a standard version, the suspended Terraglide, and the frame-pivoting SuperSteer.

There was no instrument panel behind the steering wheel; instead, all displays were mounted on a cab pillar. Most of the controls were located in an armrest console. Cabin noise level had risen slightly compared to the previous model, to 74 dB. Mirrors were electrically adjustable. Optional equipment included an active-suspension seat and automatic climate control. The electrical system was based on a CAN bus.

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