Compare/Challenger MT645E vs Challenger MT655B

Challenger MT645E vs Challenger MT655B

Verdict: Challenger MT645E vs Challenger MT655B

The Challenger MT645E and the Challenger MT655B are both tractors — here is how they stack up on the figures that matter. Challenger MT655B leads on rated power with 225 hp against 218 hp. Challenger MT645E is the lighter machine (10,800 kg vs 19,550 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Challenger MT645E is the newer design (2014 vs 2005). In short: choose the Challenger MT655B 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

218 hp

225 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Challenger (a part of AGCO)Reference

Pull at 2.45KPHReference

Pull at 3.7 KPHReference

Differential lock

electro-hydraulicReference

electrohydraulic front and rearReference

Steering

hydrostatic powerReference

—

Final drives

—

inboard planetaryReference

Trailer brakes

—

hydraulicReference

Variants

8727

similar Massey Ferguson modelReference

—

Engine

Fuel tank

628.3 LReference

—

Exhaust fluid (DEF)

59.8 LReference

—

Engine

179.0 kWReference

193.9 kWReference

Drawbar (tested)

155.9 kWReference

160.8 kWReference

Displacement

8.4 LReference

Bore/Stroke

111 x 145 mmReference

Emissions

Tier IVReference

—

Emission control

selective catalytic reduction (SCR)Reference

—

Power

179.0 kWReference

193.9 kWReference

Maximum Power

201.3 kWReference

—

Rated RPM

2100Reference

2200Reference

Starter

electricReference

—

Starter volts

12Reference

Max power

155.9 kWReference

160.8 kWReference

Power at rated engine speed

162.4 kWReference

167.6 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

—

Air cleaner

—

dual paper elementsReference

Pre-heating

—

1000W coolant heaterReference

Compression

—

17.5:1Reference

Oil capacity

—

67.0 LReference

Coolant capacity

—

33.7 LReference

Transmission

Techstar CVTReference

TechStarReference

Gears

infinite forward and reverse (2-range)Reference

Transmission Type

CVTReference

—

forward and reverse options

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

—

Wheel Drive

4WDReference

—

PTO & Hydraulics

PTO (claimed)

152.9 kWReference

164.1 kWReference

PTO (tested)

180.9 kWReference

188.2 kWReference

Type

continuously variable transmission (CVT)Reference

Pressure

200.0 barReference

Valves

4 to 6Reference

Pump flow

204.4 lpmReference

—

Rear Type

III/IVNReference

IIIReference

Rear lift (at ends)

11999 kgReference

—

Drawbar

Cat 4 (optional)Reference

—

Rear PTO

independentReference

Rear PTO Type

1000/1000E (1.75)Reference

1000 (1.75)Reference

Power at rated PTO speed

180.0 kWReference

184.5 kWReference

Hydraulic system

—

99.9 LReference

Total flow

—

147.6 lpmReference

Rear lift (at 24"/610mm)

—

7076 kgReference

Front Hitch

—

IIReference

Front lift

—

5488 kgReference

Clutch

—

electro-hydraulic wet discReference

Engine RPM

—

1000@2031Reference

Dimensions

Wheelbase

309 cmReference

307 cmReference

Weight

10800 kgReference

19550 to 20290 poundsReference

Length

555 cmReference

523 cmReference

Height (cab)

358 cmReference

313 cmReference

Shipping weight

10800 kgReference

—

Bar rear axle

109 by 2997 mmReference

Front tire

—

380/85R34Reference

Rear tire

—

480/80R46Reference

Ag front

—

380/85R34Reference

Ag rear

—

480/80R46Reference

Width

—

299 cmReference

Ground clearance

—

56 cmReference

Rear tread

—

152 to 223 cmReference

Shipping

—

8867 kgReference

Operating

—

9203 kgReference

Ballasted

—

12056 kgReference

Max Drawbar

—

2549 kgReference

Max front axle

—

4926 kgReference

Max rear axle

—

7731 kgReference

Electrical

Ground

negativeReference

Charging system

alternatorReference

Charging amps

240 (twin 120A)Reference

150Reference

Charging volts

12Reference

—

Battery volts

12Reference

Batteries

—

2Reference

Battery CCA

—

775Reference

Test results

Fuel use

54.1 l/hourReference

51.1 l/hourReference

Max pull

10319 kgReference

11165 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

99.9 LReference

Diesel exhaust fluid (DEF) tank

59.8 LReference

—

Fuel

—

601.8 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.