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World’s Top 10 Biggest Tractors (2026 update)
By Patrik Eder and Florentina Chiriță · Updated: January 28, 2026 · Published: January 13, 2022
Tractors are well-known heavy machines engineered to deliver high tractive force at low operating speeds. This capability makes them indispensable across a wide range of agricultural and construction tasks, including tillage, ploughing, harrowing, forestry operations, and landscaping.
The largest modern tractors are equipped with engines rated in the hundreds of horsepower, enabling them to haul massive implements, large grain carts, and other heavy agricultural attachments. These machines typically work on expansive farms that can span hundreds-or even thousands-of square kilometres.
Now, let’s take a closer look at the Top 10 biggest tractors. The ranking is based primarily on peak engine horsepower, but other important factors-such as dimensions, operating weight, and overall performance-are also considered. While many of the tractors featured are custom-built, several high-power models from manufacturers like John Deere, Fendt, and MeriCrusher are commercially available.
But what exactly defines a tractor as “big”? It’s not just about engine size. Determining the biggest tractors requires a multi-dimensional evaluation based on several performance factors:
Criteria for Defining the “Biggest” Tractors
The bigness of a tractor is not defined by a single number. Instead, it is a multi-dimensional metric that considers several performance factors:
Maximum/Peak Engine Horsepower (Primary Metric):
Used as the main ranking criterion, as it represents the tractor’s absolute power potential.
Tractive Power Transfer
Measures the ability to deliver power to the ground without excessive wheel slip. Heavy, well-ballasted models and 4-track articulated designs excel in this area.
Hydraulic Power Density
Reflects the capacity to operate high-demand hydraulic implements, such as large air seeders. Even a 900-hp tractor can be ineffective if hydraulic output is insufficient.
Operating Weight
Heavier tractors generally achieve better power transfer and stability, especially when pulling large implements under heavy load.
While peak engine horsepower forms the basis of this ranking, context regarding operating weight, tractive capability, and hydraulic performance ensures a more accurate comparison. This includes everything from custom-built giants of the late 20th century to modern, commercially available, robot-ready units.
*Please note that many tractors appearing in this ranking are custom-made. Nevertheless, several high-power models from manufacturers such as John Deere, Fendt, and MeriCrusher are fully commercial products.
1. Big Bud 16V-747 – 1100 hp (820 kW)
2. Big Bud 950/50 – 950 hp (710 kW)
3. John Deere 9RX 830 – 913 hp (681 kW)
4. John Deere 10X 890 "Copy Cat" – ~890 hp (663 kW)
5. Case IH Steiger 785 Quadtrac – 853 hp (636 kW)
6. Rite 750 Earthquake – 850 hp (634 kW)
7. John Deere 9RX 770 – 847 hp (632 kW)
8. ACO 600 Oubaas – 820 hp (612 kW)
9. MeriCrusher MT-700 – 768 hp (565 kW)
10. Big Bud 700 – 750 hp (559 kW)
10. Big Bud 700
Image Source: glen_lloyd - The Combine Forum
The Big Bud 700 ranks 10th in the 2026 high-horsepower list, surpassing several 2024 models, including the Rite 707 and Case IH Steiger 715. This updated version builds on the heritage of the classic Big Bud with engineering improvements for modern farming and construction applications.
Equipped with an 18.0L engine, the Big Bud 700 is typically rated around 700 hp, with peak outputs reported up to 750 hp. Its peak horsepower places it among the higher-powered tractors in its class. Modernized by companies such as Welker Farms, it features a heavy-duty drivetrain, mechanical PTO, GPS guidance, and oversized tires, including Low Sidewall Technology options. The 1.5-inch steel chassis provides structural strength, and a maximum ballasted weight of 84,000 lbs (38,100 kg) supports effective power transfer to the ground.
Equipped with an 18.0L engine, the Big Bud 700 is typically rated around 700 hp, with peak outputs reported up to 750 hp. Its peak horsepower places it among the higher-powered tractors in its class. Modernized by companies such as Welker Farms, it features a heavy-duty drivetrain, mechanical PTO, GPS guidance, and oversized tires, including Low Sidewall Technology options. The 1.5-inch steel chassis provides structural strength, and a maximum ballasted weight of 84,000 lbs (38,100 kg) supports effective power transfer to the ground.
| Manufacturer | Big Bud |
| Status | Production / Modernized |
| Rated Horsepower | ~700 hp (522 kW) |
| Maximum Horsepower | 750 hp (559 kW) |
| Engine | 18.0L inline-6 |
| Operating Weight | 84,000 lbs (38,100 kg) max ballasted |
9. MeriCrusher MT-700
Image Source: CASE IH
The MeriCrusher MT-700 ranks 9th in the 2026 high-horsepower list, down from 7th in 2024 as newer models enter the lineup. Unlike most tractors in this ranking, which are primarily used for drawbar work such as pulling plows or seeders, the MT-700 is configured for direct PTO operations, suitable for tasks like forestry mulching and land clearing.
Manufactured by Suokone Oy in Finland, the MT-700 is powered by a Volvo TAD 1643 VE 16.1L engine, delivering a rated 700 hp (515 kW, Tier 4F) with peak outputs up to 768 hp (565 kW, Tier 2). Its mechanical PTO is designed for high-demand operations. The tractor has an operating weight of approximately 41,230 lbs (18,700 kg), a hydrostatic drive with stepless speeds from 0–18 km/h, and double-acting, independently controlled lift arms for precise implement positioning.
Manufactured by Suokone Oy in Finland, the MT-700 is powered by a Volvo TAD 1643 VE 16.1L engine, delivering a rated 700 hp (515 kW, Tier 4F) with peak outputs up to 768 hp (565 kW, Tier 2). Its mechanical PTO is designed for high-demand operations. The tractor has an operating weight of approximately 41,230 lbs (18,700 kg), a hydrostatic drive with stepless speeds from 0–18 km/h, and double-acting, independently controlled lift arms for precise implement positioning.
| Manufacturer | Suokone Oy (Finland) |
| Status | Production (Specialty) |
| Rated Horsepower | 700 hp (515 kW) Tier 4F |
| Maximum Horsepower | 768 hp (565 kW) Tier 2 |
| Engine | Volvo TAD 1643 VE (16.1L) |
| Operating Weight | ~41,230 lbs (18,700 kg) |
8. ACO 600 Oubaas
Image Source: Brad Johnson - Pinterest
The ACO 600 Oubaas ranks 8th in the 2026 list. Built in 1994 by Alph and Koos Coetzer in South Africa, it was sold to one of the country’s largest farms. At the time of its launch, it was among the most powerful tractors produced in small-series manufacturing.
Powered by an ADE 444TI V12 biturbo engine, based on licensed Mercedes-Benz designs, it delivers a rated 820 hp (612 kW) and peak outputs up to 820 hp (612 kW) to a Twin Disc powershift transmission. The tractor was a one-off model, but the broader ACO tractor series served South African farms for over 30 years. With the closure of the ACO factory, support for these machines has ended.
Powered by an ADE 444TI V12 biturbo engine, based on licensed Mercedes-Benz designs, it delivers a rated 820 hp (612 kW) and peak outputs up to 820 hp (612 kW) to a Twin Disc powershift transmission. The tractor was a one-off model, but the broader ACO tractor series served South African farms for over 30 years. With the closure of the ACO factory, support for these machines has ended.
| Manufacturer | ACO (South Africa) |
| Status | Historic |
| Rated Horsepower | 820 hp (612 kW) |
| Maximum Horsepower | 820 hp (612 kW) |
| Engine | ADE 444TI V12 |
| Operating Weight | ~55,000 lbs (~25,000 kg) |
7. John Deere 9RX 770
Image Source: MeriCrusher
The John Deere 9RX 770 ranks 7th in the 2026 high-horsepower list. It is powered by the JD18 18.0L engine, rated at 770 hp (574 kW) with peak outputs up to 847 hp (632 kW). The tractor uses the 9RX chassis and carries a maximum operating weight of 84,000 lbs (38,100 kg).
The 9RX 770 shares hydraulics and structural components with the flagship 830 model, but features different engine mapping and fuel calibration. It is capable of pulling large implements, including 60-foot high-speed disks, and provides a lower-cost alternative to the 830 while maintaining similar performance characteristics.
The 9RX 770 shares hydraulics and structural components with the flagship 830 model, but features different engine mapping and fuel calibration. It is capable of pulling large implements, including 60-foot high-speed disks, and provides a lower-cost alternative to the 830 while maintaining similar performance characteristics.
| Manufacturer | John Deere |
| Status | Production (Model Year 2025) |
| Rated Horsepower | 770 hp (574 kW) |
| Maximum Horsepower | 847 hp (632 kW) |
| Engine | JD18 (18.0L) |
| Operating Weight | 84,000 lbs (38,100 kg) max |
6. Rite 750 Earthquake
Image Source: Matthias Mumme/traction
The Rite 750 Earthquake ranks 6th in the 2026 list. Built in the U.S. by Dave and John Curtis of Rite Tractors, it was produced as part of a limited run of 38 units starting in 1973. The “750” in its name reflects its original horsepower rating, which was among the highest for tractors of its era.
This tractor later received upgrades, including a reworked Detroit Diesel 12V92 two-stroke V12 engine, boosting output to a rated 850 hp (634 kW) with peak outputs of approximately 850 hp (634 kW). It features an Allison automatic transmission and a truck-style transfer case, which facilitated field maintenance compared to some proprietary drivetrains of the time.
The Rite 750’s design accommodates the cooling requirements of the Detroit Diesel engine and represents one of the high-horsepower tractors produced by the Curtis brothers’ company.
This tractor later received upgrades, including a reworked Detroit Diesel 12V92 two-stroke V12 engine, boosting output to a rated 850 hp (634 kW) with peak outputs of approximately 850 hp (634 kW). It features an Allison automatic transmission and a truck-style transfer case, which facilitated field maintenance compared to some proprietary drivetrains of the time.
The Rite 750’s design accommodates the cooling requirements of the Detroit Diesel engine and represents one of the high-horsepower tractors produced by the Curtis brothers’ company.
| Manufacturer | Rite Manufacturing (Dave & John Curtis) |
| Status | Custom / Historic |
| Rated / Maximum Horsepower | 850 hp (634 kW) |
| Engine | Detroit Diesel 12V92 (V12, 2-stroke) |
| Operating Weight | 63,040 lbs (~28,594 kg) unballasted |
5. Case IH Steiger 785 Quadtrac
Image source: John Deere
The Case IH Steiger 785 Quadtrac ranks 5th in the 2026 high-horsepower list. It expands Case IH’s lineup beyond the Steiger 715 model.
The tractor is powered by an FPT Cursor 16 engine with a displacement of 15.9L, producing a rated 785 hp (585 kW) and a peak output of 853 hp (636 kW) through a twin-turbo setup. A smaller turbo provides responsiveness at low RPMs, while a larger turbo supports high RPM operation.
The 785 features the Heavy-Duty Suspension (HDS) undercarriage, which isolates the track roller frame from the chassis. This design reduces vibration and enables higher transport speeds of up to 26.5 mph.
A limited “Steiger Green” edition commemorates the original tractors built by Douglass and Maurice Steiger in Minnesota during the 1950s.
The tractor is powered by an FPT Cursor 16 engine with a displacement of 15.9L, producing a rated 785 hp (585 kW) and a peak output of 853 hp (636 kW) through a twin-turbo setup. A smaller turbo provides responsiveness at low RPMs, while a larger turbo supports high RPM operation.
The 785 features the Heavy-Duty Suspension (HDS) undercarriage, which isolates the track roller frame from the chassis. This design reduces vibration and enables higher transport speeds of up to 26.5 mph.
A limited “Steiger Green” edition commemorates the original tractors built by Douglass and Maurice Steiger in Minnesota during the 1950s.
| Manufacturer | CNH Industrial / Case IH |
| Status | Production (Model Year 2025/2026) |
| Rated Horsepower | 785 hp (585 kW) |
| Maximum Horsepower | 853 hp (636 kW) |
| Engine | FPT Cursor 16 (15.9L, 6-cylinder, Twin Turbo) |
| Operating Weight | ~70,000+ lbs (~31,750+ kg, Variable ballast) |
4. John Deere 10X 890 "Copy Cat"
Image Source: Marcus Pasveer - Traktor
The John Deere 10X 890, known as “Copy Cat,” ranks 4th in the 2026 list. This custom-built tractor was created by Ashton Lewis and Bobby White by modifying a 1990 John Deere 8960. The project was inspired by a similar rebuild by Bill Dietrich, and the tractor was named “Copy Cat” as a reference to the original machine.
The transformation involved installing a Caterpillar 3412 V12 industrial engine, significantly larger than the engines originally used in John Deere’s articulated lineup. The hood and frame were extended and widened, and the cooling system was redesigned to manage the heat output of approximately 890 hp (peak).
As a heavily modified, custom unit, the Copy Cat is not a factory production tractor but has appeared in field demonstrations and high-power events.
| Manufacturer | Big Bud |
| Status | Custom / Repower |
| Rated Horsepower | 740 hp (551 kW) classic |
| Maximum Horsepower | ~890 hp (663 kW) repowered variant |
| Engine | Caterpillar 3412 (V12) |
| Operating Weight | ~55,000 lbs (~24,950 kg) |
3. John Deere 9RX 830
Image source: iOWNaFERGUSON - YouTube (Screenshot)
The John Deere 9RX 830 ranks 3rd in the 2026 high-horsepower list. It is the largest tractor in John Deere’s series production lineup.
The tractor is powered by a JD18 18-liter inline-6 engine, producing a rated 830 hp with a peak output of 913 hp and 3,123 lb-ft (4,234 Nm) of torque at 1,400 rpm. Unlike most Tier 4 Final / Stage V tractors, it operates without Diesel Exhaust Fluid (DEF), using an Exhaust Gas Recirculation (EGR) system.
Traction is provided by a four-track system with 30- or 36-inch belts and a maximum ballasted weight of 84,000 lbs (38,100 kg). Hydraulic capacity includes an optional triple pump system delivering 168 gallons per minute (636 L/min), suitable for wide implements such as air seeders.
The tractor is powered by a JD18 18-liter inline-6 engine, producing a rated 830 hp with a peak output of 913 hp and 3,123 lb-ft (4,234 Nm) of torque at 1,400 rpm. Unlike most Tier 4 Final / Stage V tractors, it operates without Diesel Exhaust Fluid (DEF), using an Exhaust Gas Recirculation (EGR) system.
Traction is provided by a four-track system with 30- or 36-inch belts and a maximum ballasted weight of 84,000 lbs (38,100 kg). Hydraulic capacity includes an optional triple pump system delivering 168 gallons per minute (636 L/min), suitable for wide implements such as air seeders.
| Manufacturer | John Deere |
| Status | Production (Model Year 2025) |
| Rated Horsepower | 830 hp (619 kW) |
| Maximum Horsepower | 913 hp (681 kW) |
| Engine | JD18 (18.0L, 6-cylinder) |
| Operating Weight | 84,000 lbs (~38,100 kg) max ballasted |
2. Big Bud 950/50
Image Source: JWR Marketing - YouTube (Screenshot)
The Big Bud 950/50 ranks 2nd in the 2026 list and is a large series-production tractor from the Big Bud lineup. Restored and rebuilt in the 2000s by Big Equipment Company, it is a fully functional field tractor designed for agricultural use.
Originally based on the Big Bud 525/50, the tractor received a major upgrade in 2016–2017 with the installation of a Caterpillar 3508 industrial V8 engine, commonly used in marine and generator applications. Unlike the high-revving two-stroke Detroit Diesel in the 16V-747, the CAT 3508 is a medium-speed, four-cycle engine optimized for torque and fuel efficiency. At peak configuration, it produced around 1,200 hp (peak), later reduced to 950 hp (rated) to limit fuel consumption and protect the transmission.
The 950/50 retains the Series 3 and 4 Big Bud design, with a forward-mounted cab over the front axle for improved visibility. Auto-steer technology is installed to facilitate modern field operations.
Originally based on the Big Bud 525/50, the tractor received a major upgrade in 2016–2017 with the installation of a Caterpillar 3508 industrial V8 engine, commonly used in marine and generator applications. Unlike the high-revving two-stroke Detroit Diesel in the 16V-747, the CAT 3508 is a medium-speed, four-cycle engine optimized for torque and fuel efficiency. At peak configuration, it produced around 1,200 hp (peak), later reduced to 950 hp (rated) to limit fuel consumption and protect the transmission.
The 950/50 retains the Series 3 and 4 Big Bud design, with a forward-mounted cab over the front axle for improved visibility. Auto-steer technology is installed to facilitate modern field operations.
| Manufacturer | Big Bud |
| Status | Custom / Extremely Limited Series |
| Rated / Maximum Horsepower | ~950 hp (710 kW) |
| Engine | Caterpillar 3508 (V8) |
| Operating Weight | ~90,000–100,000 lbs (~40,800–45,360 kg) |
1. Big Bud 16V-747
Image Source: Rwslivka - Wikipedia
The Big Bud 16V-747 ranks 1st in the 2026 list. Built in 1977 in Havre, Montana, it was originally commissioned by the Rossi Brothers for deep ripping in Bakersfield, California, intended to replace multiple large tractors with a single high-horsepower machine.
The tractor weighs approximately 50 tons and carries a 1,000-gallon (3.8 m³) fuel tank. It is powered by a Detroit Diesel 16V92T two-stroke engine, originally rated at 760 hp. Upgrades to the fuel system, injectors, and turbocharging have increased its real-world peak output to around 1,100 hp.
Power is transmitted via a Twin Disc automatic transmission with a torque converter, similar to units used in mining equipment. While less efficient than modern powershift or CVT systems, it is capable of handling high torque loads.
After a brief period in museum retirement due to the original 8-foot-tall tires going out of production, the tractor returned to service in 2020 with Goodyear LSW1400/30R46 low-sidewall tires, which reduce power hop and improve stability. The 16V-747 is now owned by the Williams Brothers in Montana and continues to be operational.
| Manufacturer | Big Bud |
| Status | Custom / One-Off (Operational) |
| Rated / Maximum Horsepower | 1,100 hp (820 kW) |
| Engine | Detroit Diesel 16V92T (16-cylinder, 2-cycle) |
| Operating Weight | 135,000 lbs (~61,235 kg) ballasted |
The 2026 high-horsepower tractor ranking includes a range of agricultural and specialty machinery, from historic one-offs to modern production models. Big Bud features prominently in the custom sector with the 16V-747 and 950/50, while John Deere and Case IH lead modern production tractors with their 9RX and Steiger series. Specialty machines such as the MeriCrusher MT-700 are designed for niche applications, and historic models like the ACO 600 “Oubaas” remain notable for their engineering and performance. Rankings are based primarily on peak engine horsepower, while also considering traction, hydraulic capacity, and operating weight to reflect overall field capability.
Top 10 High-Horsepower Tractors Table (2026)
| Rank | Tractor Model | Type | Peak HP | Engine | Operating Weight (t) |
|---|---|---|---|---|---|
| 1 | Big Bud 16V-747 | Custom / One-Off | 1,100 hp (820 kW) | Detroit Diesel 16V92T | 61.24 |
| 2 | Big Bud 950/50 | Custom / Extremely Limited Series | 950 hp (710 kW) | Caterpillar 3508 (V8) | 45.36 |
| 3 | John Deere 9RX 830 | Production | 913 hp (681 kW) | JD18 | 38.1 |
| 4 | John Deere 10X 890 "Copy Cat" | Custom / Repower | ~890 hp (663 kW) | Caterpillar 3412 (V12) | 24.95 |
| 5 | Case IH Steiger 785 Quadtrac | Production | 853 hp (636 kW) | FPT Cursor 16 | 31.75 |
| 6 | Rite 750 Earthquake | Custom / Historic | 850 hp (634 kW) | Detroit Diesel 12V92 | 28.59 |
| 7 | John Deere 9RX 770 | Production | 847 hp (632 kW) | JD18 (18.0L) | 38.1 |
| 8 | ACO 600 Oubaas | Historic | 820 hp (612 kW) | ADE 444TI V12 | 25 |
| 9 | MeriCrusher MT-700 | Specialty | 768 hp (565 kW) Tier 2 | Volvo TAD 1643 VE | 18.7 |
| 10 | Big Bud 700 | Production / Modernized | 750 hp (559 kW) | 18.0L inline-6 | 38.1 |
World’s biggest tractors FAQ
What is the biggest tractor in the world?
Constructed in 1977, the Big Bud 16V-747 holds the title of the biggest tractor in the world. It is powered by a Detroit Diesel 16V92T engine rated at 1100 hp! The custom-made tractor is currently in usage in Montana, United States of America.
What is the world's largest farm tractor?
The largest farm tractor is Big Bud 16V-747 with a base weight of 50 tons. Fully ballasted weight can reach up to 68 tons. Its length is 8.69 metres at the end of the drawbar, width 7.7 metres over dual wheels and height 4.3 metres.
How much does a big bud 747 cost?
The original price for the Big Bud 747 sold in 1977 was $300,000. Taking into account today’s inflation, its current price could be around $1,300,000. Nevertheless, it is difficult to estimate the exact price of the custom-made tractor.
How many big bud 747 were made?
The custom-made model Big Bud was constructed in Havre, Montana in 1977 and is the only one of its kind.
Are Big Bud tractors still made?
The last Big Bud tractor was manufactured in 1992 and shortly after, the company went bankrupt due to financial issues caused by lack of customers and the decline of agriculture in the United States.
