Compare/Challenger MT851 vs Challenger MT975B

Challenger MT851 vs Challenger MT975B

Verdict: Challenger MT851 vs Challenger MT975B

The Challenger MT851 and the Challenger MT975B are both tractors — here is how they stack up on the figures that matter. Challenger MT975B leads on rated power with 518 hp against 504 hp. Challenger MT975B is the lighter machine (18,038 kg vs 19,051 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Challenger MT975B holds more fuel (1476.2 L vs 1324.8 L) for longer stints between fills. Challenger MT851 is the newer design (2021 vs 2007). In short: choose the Challenger MT975B for outright pulling power, or the Challenger MT851 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

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Acreage600 acBudgetMain crop / use

Fit & specs

Challenger

Fit score

Best match

Clear

Challenger

Fit score

Best match

Clear

Rated power

504 hp

518 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Challenger (a part of AGCO)Reference

liquid-cooled inlineReference

Gear 5 used for pull test.Reference

Drive

crawlerReference

—

Final drives

—

inboard planetaryReference

Differential lock

—

electro-hydraulic front and rear optionalReference

Variants

1151 Vario MT

similar Fendt modelReference

—

Engine

Fuel tank

1324.8 LReference

1476.2 LReference

Exhaust fluid (DEF)

135.1 LReference

—

Engine (gross)

376.0 kWReference

—

Displacement

15.3 LReference

18.1 LReference

Bore/Stroke

138 x 170 mmReference

145 x 183 mmReference

Rated Power (gross)

376.0 kWReference

—

Rated RPM

1730Reference

2100Reference

Torque

2500.5 NmReference

—

Torque RPM

1450Reference

—

Starter

electricReference

—

Starter volts

24Reference

—

Oil change

500 hReference

—

Engine

—

425.0 kWReference

Drawbar (tested)

—

390.0 kWReference

Emissions

—

Tier IIIReference

Power

—

425.0 kWReference

Air cleaner

—

dual dry elementReference

Compression

—

16.3:1Reference

Max power

—

390.0 kWReference

Power at rated engine speed

—

386.4 kWReference

Transmission

Accu-VTReference

—

Gears

infinite forward and reverseReference

16 forward and 4 reverseReference

Clutch

—

hydraulic wet discsReference

PTO & Hydraulics

Type

continuously-variable transmissionReference

full power shiftReference

Pressure

200.0 barReference

Rear valves

4 to 8Reference

4 to 6Reference

Pump flow

439.8 lpmReference

—

Rear PTO

independentReference

Rear PTO Type

1000/1000EReference

1000 (1.75)Reference

PTO (claimed)

—

316.9 kWReference

PTO (tested)

—

436.0 kWReference

Total flow

—

223.3 lpmReference

Rear Type

—

IVReference

Rear lift

—

8845 kgReference

Engine RPM

—

1000@2000Reference

Power at rated PTO speed

—

411.9 kWReference

Dimensions

Wheelbase

299 cmReference

394 cmReference

Weight

19051 kgReference

18038 kgReference

Length

675 cmReference

756 cmReference

Width

294 cmReference

508 cmReference

Height

375 cmReference

—

Max weight

26762 kgReference

27216 kgReference

Ground clearance

35 cmReference

44 cmReference

Gauge

223 to 325 cmReference

—

Front tire

—

800/70R38Reference

Rear tire

—

800/70R38Reference

Ag front

—

800/70R38Reference

Ag rear

—

800/70R38Reference

Height (cab)

—

383 cmReference

Shipping weight

—

18038 kgReference

Front axle

—

145 mmReference

Rear axle

—

145 mmReference

Electrical

Ground

negativeReference

Charging system

alternatorReference

Charging amps

325Reference

185Reference

Batteries

3Reference

4Reference

Battery volts

12Reference

Battery CCA

—

1000Reference

Test results

Fuel use

—

126.8 l/hourReference

Max pull

—

20905 kgReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.