Watch the Challenger MT975-B in action- the world’s biggest, heaviest and most powerful production tractor.

The tractor, recently revealed in Holland, pumps out 615hp at maximum power and holds a monster 18.1-litre Caterpillar six-cylinder power-plant,which, according to its engineers, has plenty more capacity should extra power be required when the competition decides to up the ante.

To see pictures and to reade more about the beast, read FWi's review of this impressive machine.

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