Bobcat 331 vs Kubota KX057-4

The Kubota KX057-4 is the heavier machine, at 5.6 t against 3.27 t, and the Kubota KX057-4 has more power (33.8 kW against 29.9 kW).

The Bobcat 331 is ahead on: faster, narrower to transport. The Kubota KX057-4 is ahead on: more power, digs deeper, reaches further, dumps higher, bigger fuel tank.

Below, every figure both makers publish sits side by side, with the Bobcat 331 and the Kubota KX057-4 drawn to the same scale from their dimension drawings.

Bobcat · mini excavator
Bobcat 331
Change modelFull specs PDF
Kubota · mini excavator
Kubota KX057-4
Change modelFull specs PDF
Add a modelUp to four

At a glance

Bold is the machine ahead on each figure, with its lead.

Figure	Bobcat 331	Kubota KX057-4
Operating weight	3,273 kg	5,600 kg
Net powerHigher is better	29.9 kW	33.8 kW+13%
Max digging depthHigher is better	3.101 m	3.865 m+25%
Max reach at ground levelHigher is better	4.874 m	6.11 m+25%
Max dumping heightHigher is better	3.089 m	4.18 m+35%
Fuel tankHigher is better	57.9 L	75 L+30%
Travel speed (high)Higher is better	5.6 km/h+14%	4.9 km/h
Overall widthLower is better	1.54 m+21%	1.96 m
Overall length	4.88 m	5.52 m

All specifications

Every figure the makers publish. Search for one, or show only those that differ.

Differences only(60)

FigureBobcat 331 Kubota KX057-4

Dimensions

Overall length4.88 mTravel position; 4,882 mm in the O&M manual5.52 m

Overall height (to top of cab)2.391 m2,394 mm in the O&M manualNot published

Swing centre to front (transport)3.493 mNot published

Engine cover height1.476 mNot published

Ground clearance, counterweight0.511 m532 mm in the O&M manualNot published

Blade height0.378 m0.41 m

Overall width1.54 mOver tracks1.96 m

Shoe width0.32 mRubber track0.4 mrubber

Overall heightNot published2.55 m

Ground clearance (minimum)Not published0.31 m

Track length on groundNot published1.99 mtumbler distance

Track lengthNot published2.5 mcrawler length

Performance

Max digging height4.539 m5.74 m

Max dumping height3.089 m4.18 m

Max digging depth3.101 m3.865 m

Max vertical wall digging depth2.202 m1.71 m

Max reach at ground level4.874 m6.11 mmax digging radius at ground

Stick length1.2 mNot published

Bucket digging force31 kN5,070 kgfmax breakout force, bucket

Rated lift capacity602 kgNot published

Swing speed9.2 rpm9.3 rpm

Minimum swing radius1.4 mNot published

Boom swing, left90°Not published

Boom swing, right50°Not published

Travel speed (high)5.6 km/h4.9 km/h

Travel speed (low)2.1 km/h2.8 km/h

Ground pressure29.4 kPa0.323 kgf/cm2 (4.59 psi) rubber tracks

Weight

Operating weight3,273 kg5,600 kg

Engine

Engine modelKubota V2203-EBKubota V2607-DI

Cylinders4D-series O&M manualNot published

Displacement2.2 L2.6 L

Net power29.9 kW (40.0 hp)SAE net at 2,400 rpm33.8 kW (45.4 HP)SAE J1349, at 2,200 rpm

Gross powerNot published35.5 kW (47.6 HP)SAE J1995, at 2,200 rpm

Hydraulics

Pump flow91 L/minTotal capacity; imperial 24 gpm56.1 L/min (14.8 gpm) variable x 2 + 37.0 L/min (9.8 gpm) gear

Auxiliary circuit flow62 L/minNot published

Auxiliary circuit relief172 barNot published

Auxiliary flowNot published75 L/minAUX1; AUX2 37 L/min (9.8 gpm)

Service capacities

Fuel tank57.9 L75 L

Hydraulic tank29.5 L45 Lreservoir

Engine oil, with filter7.1 LNot published

Cooling system15.1 LWithout heater, including recovery tankNot published

Final drive oil, each side1.6 LNot published

Hydraulic system, with tankNot published79 L

Service intervals

Engine oil and filter250 hoursFirst change at 50 hNot published

Fuel filters250 hoursNot published

Hydraulic filter500 hoursAlso at first 100 hNot published

Hydraulic oil1,000 hoursWith the filter; also at first 100 hNot published

Final drive oil1,000 hoursNot published

Coolant1,000 hoursOr every 6 monthsNot published

Swing circle and pinion grease50 hoursThree fittingsNot published

Pivot points grease10 hours21 placesNot published

Working range

Max digging reachNot published6.24 mmax digging radius

Min turning radiusNot published2.42 m

Tail swing radiusNot published1.27 m

Arm digging forceNot published2,560 kgfmax breakout force, arm

Boom swingNot published70 deg. left / 55 deg. right

Max traction forceNot published6,567 kgf

Blade

Blade widthNot published1.96 m

Max blade heightNot published0.44 m

Max blade depthNot published0.41 m

Sources: Bobcat D-Series Excavators brochure (322, 325, 328, 331, 331E, 334, 337, 341), Machine.Market copy of the Bobcat Company brochure · Kubota KX057-4 brochure 8783-02-CL (Kubota Canada, 2009-09), copy on kitchingplanthire.co.uk

Drawn to scale

Side views measured off each maker's dimension drawing, front edges and ground lined up.

Bobcat 331Kubota KX057-4Same scale, front edges and ground lined up.

Bobcat 331 vs Kubota KX057-4: questions

Which is bigger, the Bobcat 331 or Kubota KX057-4?

By operating weight the Kubota KX057-4 is the biggest at 5.6 t, then the Bobcat 331 at 3.27 t.

Which has more power, the Bobcat 331 or Kubota KX057-4?

The Kubota KX057-4: Bobcat 331 29.9 kW (40.0 hp), Kubota KX057-4 33.8 kW (45.4 HP) (net power), a 13% difference.

Which digs deeper, the Bobcat 331 or Kubota KX057-4?

The Kubota KX057-4: Bobcat 331 3.101 m, Kubota KX057-4 3.865 m (max digging depth), a 25% difference.

Which reaches further, the Bobcat 331 or Kubota KX057-4?

The Kubota KX057-4: Bobcat 331 4.874 m, Kubota KX057-4 6.11 m (max reach at ground level), a 25% difference.

Which has the bigger fuel tank, the Bobcat 331 or Kubota KX057-4?

The Kubota KX057-4: Bobcat 331 57.9 L, Kubota KX057-4 75 L (fuel tank), a 30% difference.

Which is narrower to transport, the Bobcat 331 or Kubota KX057-4?

The Bobcat 331: Bobcat 331 1.54 m, Kubota KX057-4 1.96 m (overall width), a 21% difference.

Where do these figures come from?

Each model's own published spec sheet or brochure, linked under the table. Builds differ by market and year, so confirm the figures for a particular machine with its dealer.

Can I rent or buy these machines in the UAE?

Each model's page lists the ones for hire and for sale on EquipmentsFinder now, with typical prices in AED.