5 Biggest Tractors in the World

5Caterpillar MT875E

Built by Challenger, a part of AGCO, in Minnesota USA, the MT875E brings three top-of-range options for a big tractor rated at over 600hp. The rubber track drive and its suspension systems have been designed by Caterpillar, giving this tractor an edge over the competition. The hydraulic cylinder used to apply pressure to the undercarriage eats a lot of the shocks and quickly smooth the ride after tackling an obstacle.

Unlike other tractors in the range that put all their money into performance, the MT875E also brings perks to the driver cabin. The Pinnacle Cab gives a 360-degree view allowing the operator to check on the implement, drawbar, and the tracks. The seat is vented and heated while the leather cover brings a lot more comfort into the mix.

4AGCO Challenger MT975

While it’s smaller in size than the tractors mentioned so far, the AGCO Challenger MT975 boasts the heaviest tractor frame on this list. It’s 24ft by 16ft with a 12ft height. Given its height, you need six steps to get into the cabin.

The tractor is powered by a Caterpillar C18 engine displacing 18.1-liter and sending 570hp through a powershift 20-gear transmission. It uses a 4-wheel drive with wet disc brakes hidden inside 70” wheels.

3Case IH Steiger Quadtrac 620

A leader and reference model in current agricultural machinery, the Case IH Steiger Quadtrac 620 is one of the biggest currently used tractors in the world.

It’s rated to 620hp from a CASE IH FPT, 12.9-liter two-stage turbo engine. Intercoolers and aftercooler systems keep the large turbochargers working at optimum temperatures while thanks to a high-pressure common-rail, an electronically controlled fuel system, power can be temporarily boosted to 682hp.

In its articulated crawler setup, the four independent tracks will yield one of the lowest distributed pressure values in its range. A low distributed pressure of the tracks will avoid heavy compaction of the field behind the tractor, aiding in agricultural processes, for example during sowing.

2Versatile 1080 Big Roy

Introduced in 1977, the 1080 Big Roy was built on Canadian prairies. It was designed and put together by Versatile company to replace the existing 976 models. The history of how the 1080 Big Roy came to be is slightly covered in fog.

While some would argue that it was created to help Australian farmers better cultivate their high-acre farms, other sources indicate that Versatile created 1080 Big Roy to enter the “biggest tractor” race that started between Steiger and Big Bud.

1080 Big Roy is powered by a 19-liter Cummins KTA-1150 engine mounted on the rear. The engine is cooled via two large capacity radiators summing 159liters, with two 28-inch mechanical fans pushing air through the fins to cool engine fluid. 1080 Big Roy used a 6-speed gearbox to control its 8-wheel drive system.

1Big Bud 16V-747

Sitting at a staggering 28ft length and 20ft wide, Big Bud was built for the first time in 1977 by Northern Manufacturing facility based in Montana. The 16V-747 Big Bud is billed by the owners and exhibitors as the "World's Biggest Tractor".

It weighs 95,000 lbs. or over 100,000 lbs. when the 1000-gallon fuel tank is filled. If a ballast is required, weight goes further up to 135,000 lbs.

Big Bud uses a Detroit Diesel 16V92T, 24.1-liter, 16-cylinder engine. The 16V92T is made by joining to 8-cylinder blocks and had an initial power output of 760hp. Over time, power delivery was boosted to 960hp and now it sits at an impressive 1100hp.

To better put it in perspective, most of the currently produced agricultural tractors come nowhere near the huge amounts of power output provided by Big Bud. In fact, the John Deere 9630, the largest tractor of the brand only outputs roughly half of what Big Bud’s engine can.

Consequently, Big Bud 747 is rated for 50-plow, yet not use in such manner due to lack of practicality.