Compare/Challenger 55 vs Challenger MT645E

Challenger 55 vs Challenger MT645E

Verdict: Challenger 55 vs Challenger MT645E

The Challenger 55 and the Challenger MT645E are both tractors — here is how they stack up on the figures that matter. Challenger 55 leads on rated power with 225 hp against 218 hp. Challenger MT645E is the lighter machine (10,800 kg vs 11,793 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Challenger MT645E holds more fuel (628.3 L vs 473.1 L) for longer stints between fills. Challenger MT645E is the newer design (2014 vs 1996). In short: choose the Challenger 55 for outright pulling power, or the Challenger MT645E 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

225 hp

218 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Challenger (a part of Caterpillar)Reference

Challenger (a part of AGCO)Reference

liquid-cooledReference

Pull at 2.45KPHReference

Drive

crawlerReference

—

Steering

differential powerReference

hydrostatic powerReference

Differential lock

—

electro-hydraulicReference

Engine

Fuel tank

473.1 LReference

628.3 LReference

Drawbar (claimed)

142.4 kWReference

—

Displacement

7.2 LReference

8.4 LReference

Bore/Stroke

110 x 127 mmReference

111 x 145 mmReference

Rated RPM

2100Reference

Starter volts

12Reference

Coolant capacity

32.6 LReference

—

Exhaust fluid (DEF)

—

59.8 LReference

Engine

—

179.0 kWReference

Drawbar (tested)

—

155.9 kWReference

Emissions

—

Tier IVReference

Emission control

—

selective catalytic reduction (SCR)Reference

Power

—

179.0 kWReference

Maximum Power

—

201.3 kWReference

Starter

—

electricReference

Max power

—

155.9 kWReference

Power at rated engine speed

—

162.4 kWReference

Fuel Type

—

dieselReference

No of Cylinders

—

6 CylinderReference

Rated engine speed

—

2,100 RPMReference

Emissions compliance

—

Tier IV | selective catalytic reduction (SCR)Reference

Bore and stroke

—

4.37x5.71 inchesReference

Cooling system

—

liquid-cooledReference

Transmission

Gears

32 forward and 18 reverseReference

infinite forward and reverse (2-range)Reference

Transmission

—

Techstar CVTReference

Transmission Type

—

CVTReference

forward and reverse options

—

continuously variable transmission - infinite F and (2-range) RReference

Wheel Drive

—

4WDReference

PTO & Hydraulics

PTO (claimed)

167.8 kWReference

152.9 kWReference

Type

creeperReference

continuously variable transmission (CVT)Reference

Pressure

189.6 barReference

200.0 barReference

Valves

3 or 4Reference

4 to 6Reference

Pump flow

208.2 lpmReference

204.4 lpmReference

Rear Type

III/IIReference

III/IVNReference

Control

draft controlReference

—

Rear lift

6804 kgReference

—

Rear PTO

independentReference

Clutch

electro-hydraulic wet discReference

—

Rear PTO Type

1000 (1.75)Reference

1000/1000E (1.75)Reference

Engine RPM

1000@1900Reference

—

PTO (tested)

—

180.9 kWReference

Rear lift (at ends)

—

11999 kgReference

Drawbar

—

Cat 4 (optional)Reference

Power at rated PTO speed

—

180.0 kWReference

Dimensions

Wheelbase

218 cmReference

309 cmReference

Weight

11793 kgReference

10800 kgReference

Length

535 cmReference

555 cmReference

Height (cab)

304 cmReference

358 cmReference

Height (exhaust)

317 cmReference

—

Gauge

152/172/182/193/203/223/228 cmReference

—

Shipping weight

—

10800 kgReference

Bar rear axle

—

109 by 2997 mmReference

Electrical

Ground

negativeReference

Charging system

alternatorReference

Battery volts

12Reference

Charging amps

—

240 (twin 120A)Reference

Charging volts

—

12Reference

Challenger 55 Tracks

Width

231 cmReference

—

Variants

8727

—

similar Massey Ferguson modelReference

Test results

Fuel use

—

54.1 l/hourReference

Max pull

—

10319 kgReference

General

Make & Model

—

Challenger (a part of AGCO)Reference

Cruise control

—

AvailableReference

Drawbar category

—

Cat. 3Reference

Rear Axle Type

—

Bar: 4.33 by 105 inchesReference

Country of manufacturer

—

USAReference

Capacities

Capacity

—

512.6 ciReference

Diesel exhaust fluid (DEF) tank

—

59.8 LReference

Hydraulics

Capacity Valves

—

24 ValvesReference

Hydraulics Type

—

closed center load sensing (CCLS)Reference

Maximum operating pressure

—

2,900 psiReference

Remote Valves

—

4 to 6 ValvesReference

Rear Hitch category (SAE designation)

—

Category III/IVNReference

Rear Hitch maximum lift capacity

—

11,999.8 kgReference

Power

Rated Power

—

240 hpReference

PTO

PTO Power

—

205 hpReference

Rear PTO Power

—

AvailableReference

Rear PTO RPM

—

1,000 RPMReference

Steering & brakes

Brakes

—

Hydraulic wet disc brakesReference

Steering type

—

hydrostatic powerReference

Dimensions & weight

Height Over Cab

—

358.1 cmReference

Overall Length

—

555.2 cmReference

Overall weight

—

10,800 kgReference

Operator station

Cab Availability

—

AvailableReference

Seat Suspension

—

TrueReference

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.