It was mainly used in Germany by Ordnungspolizei, but few were utilized by Wehrmacht to ferry supplies.

The vehicle had an 8-cylinder diesel engine with 12,467 cc (12.467 L) rated to 117.8 kW (158.0 hp) power.

The civilian use Tatra 81H and Tatra 81HB were fitted with wood gas generator and a 14726 cc, 110.4 kW (148.0 hp) power engine working on wood gas.

[2] To avoid drastic reduction of the engine power, the pistons diameter was increased by 10 mm (0.39 in).

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