Compare/Challenger MT645D vs Challenger MT735

Challenger MT645D vs Challenger MT735

Verdict: Challenger MT645D vs Challenger MT735

The Challenger MT645D and the Challenger MT735 are both tractors — here is how they stack up on the figures that matter. Challenger MT645D leads on rated power with 240 hp against 235 hp. Challenger MT645D is the lighter machine (10,999 kg vs 12,784 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Challenger MT645D holds more fuel (632.2 L vs 446.6 L) for longer stints between fills. Challenger MT645D is the newer design (2011 vs 2002). In short: choose the Challenger MT645D for outright pulling power, or the Challenger MT735 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

Clear

Challenger

Fit score

Best match

Clear

Rated power

240 hp

235 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

Challenger (a part of AGCO)Reference

CaterpillarReference

Pull at 4.13 KPHReference

Gear 2 used for pull test.Reference

Final drives

inboard planetaryReference

—

Differential lock

electro-hydraulicReference

—

Steering

hydrostatic powerReference

electro-hydraulicReference

Trailer brakes

hydraulic (optional)Reference

—

Drive

—

crawlerReference

Variants

8650

similar Massey Ferguson modelReference

—

Engine

Engine (gross)

179.0 kWReference

175.2 kWReference

Drawbar (tested)

127.3 kWReference

119.6 kWReference

Displacement

8.4 LReference

8.8 LReference

Bore/Stroke

111 x 145 mmReference

112 x 149 mmReference

Emissions

Interim Tier IVReference

—

Emission control

selective catalytic reduction (SCR)Reference

—

Power (gross)

179.0 kWReference

175.2 kWReference

Maximum Power

201.3 kWReference

—

Fuel system

electronic high-pressure common railReference

—

Pre-heating

thermostartReference

—

Compression

16.7:1Reference

16.0:1Reference

Rated RPM

2100Reference

Starter

electricReference

—

Starter volts

12Reference

Max power

127.3 kWReference

119.6 kWReference

Power at rated engine speed

161.0 kWReference

139.2 kWReference

Fuel Type

dieselReference

—

No of Cylinders

6 CylinderReference

—

Rated engine speed

2,100 RPMReference

—

Emissions compliance

Interim Tier IV | selective catalytic reduction (SCR)Reference

—

Bore and stroke

4.370x5.709 inchesReference

—

Compression ratio

16.7:1Reference

—

Cooling system

liquid-cooledReference

—

Drawbar (claimed)

—

132.7 kWReference

Air cleaner

—

dual paper elementsReference

Transmission

Techstar CVTReference

—

Gears

infinite forward and reverseReference

30 forward and 8 reverseReference

Transmission Type

CVTReference

—

forward and reverse options

continuously variable transmission - infinite F and infinite RReference

—

Wheel Drive

4WDReference

—

Track Drive type

inboard planetaryReference

—

PTO & Hydraulics

PTO (claimed)

152.9 kWReference

138.0 kWReference

PTO (tested)

187.0 kWReference

160.8 kWReference

Hydraulic system

110.1 LReference

—

Type

continuously variable transmissionReference

creeperReference

Capacity

110.1 LReference

—

Pressure

200.0 barReference

Valves

4 to 6Reference

SCV flow

99.9 lpmReference

—

Total flow

174.1 lpmReference

164.6 lpmReference

Rear Type

IIIReference

Rear lift

10323 kgReference

7257 kgReference

Front Hitch

III (optional)Reference

—

Front lift (at ends)

4989 kgReference

—

Drawbar

Cat. 4 (optional)Reference

—

Rear PTO

independentReference

Clutch

electro-hydraulicReference

hydraulic wet discReference

Rear PTO Type

540E/1000/1000E (optional)Reference

1000 (1.75)Reference

Engine RPM

1000@1970Reference

—

Power at rated PTO speed

186.4 kWReference

149.6 kWReference

Capacities

Fuel

632.1 LReference

—

Exhaust fluid (DEF)

60.6 LReference

—

Fuel tank

632.2 LReference

787.3 LReference

Diesel exhaust fluid (DEF) tank

60.6 LReference

—

Dimensions

Wheelbase

309 cmReference

243 cmReference

Weight

10999 kgReference

12784 kgReference

Front tire

480/70R34Reference

—

Rear tire

520/85R46Reference

—

Standard tires (ag)

Front: 480/70R34. Rear: 520/85R46Reference

—

Length

547 cmReference

—

Height (cab)

358 cmReference

—

Shipping weight

10999 kgReference

—

Max weight

15000 kgReference

—

Front axle

4WD Quadlink SuspensionReference

—

Rear axle

109 by 2997 mmReference

—

Bar rear axle

—

4064 mmReference

Gauge

—

304 to 406 cmReference

Electrical

Ground

negativeReference

Charging system

alternatorReference

Charging amps

240Reference

160Reference

Batteries

2Reference

—

Battery volts

12Reference

Test results

Fuel use

43.5 l/hourReference

42.8 l/hourReference

Max pull

11659 kgReference

11884 kgReference

General

Make & Model

Challenger (a part of AGCO)Reference

—

Drawbar category

Cat. 3Reference

—

Rear Axle Type

4.33 by 105 inchesReference

—

Front Axle Type

4WD | 4WD Quadlink SuspensionReference

—

Country of manufacturer

USAReference

—

Power

Rated Power

240 hpReference

—

PTO

PTO Power

205 hpReference

—

Rear PTO Power

AvailableReference

—

Rear PTO RPM

1,000 RPMReference

—

Engine Speed on Rear PTO speed

540E@1,577 RPMReference

—

Steering & brakes

Brakes

Hydraulic wet disc brakesReference

—

Steering type

hydrostatic powerReference

—

Hydraulics

Pump Rated Output (total)

46 gpmReference

—

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 IIIReference

—

Rear Hitch maximum lift capacity

10,323.8 kgReference

—

Front Hitch category (SAE designation)

Category III (optional)Reference

—

Dimensions & weight

Height Over Cab

358.1 cmReference

—

Overall Length

547.9 cmReference

—

Overall weight

10,999.6 kgReference

—

Wheels & tyres

Rear Wheel Type

520/85R46 agReference

—

Front Wheel Type

480/70R34 agReference

—

Operator station

Cab Availability

AvailableReference

—

Seat Suspension

TRUEReference

—

MT735 Serial Numbers

2002

—

AKN20000Reference

2003

—

AKN30000Reference

2004

—

AKN40000Reference

Location:

—

On main tractor frame, front left side.Reference

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.