Cat 320 vs Komatsu PC400
The Komatsu PC400 is the heavier machine, at 41.7 t against 21.3 t, and the Komatsu PC400 has more power (257 kW against 117 kW).
The Cat 320 is ahead on: turns tighter, narrower to transport, lower to transport. The Komatsu PC400 is ahead on: more power, digs deeper, reaches further, dumps higher, bigger bucket or body, more digging or pushing force, more hydraulic flow, bigger fuel tank.
Below, every figure both makers publish sits side by side, with the Cat 320 and the Komatsu PC400 drawn to the same scale from their dimension drawings.
At a glance
Bold is the machine ahead on each figure, with its lead.
| Figure | Cat 320 | Komatsu PC400 |
|---|---|---|
| Operating weight | 21,300 kg | 41,740 kg |
| Net powerHigher is better | 117 kW | 257 kW+120% |
| Max digging depthHigher is better | 6.72 m | 7.82 m+16% |
| Max reach at ground levelHigher is better | 9.86 m | 11.82 m+20% |
| Max dumping heightHigher is better | 6.49 m | 7.565 m+17% |
| Bucket capacityHigher is better | 1.19 m³ | 1.9 m³+60% |
| Bucket digging forceHigher is better | 150 kN | 275 kN+83% |
| Pump flowHigher is better | 429 L/min | 690 L/min+61% |
| Fuel tankHigher is better | 345 L | 650 L+88% |
| Tail swing radiusLower is better | 2.83 m+22% | 3.645 m |
| Overall widthLower is better | 2.98 m+13% | 3.43 m |
| Overall height (to top of cab)Lower is better | 2.96 m+10% | 3.285 m |
| Overall length | 9.53 m | 11.94 m |
All specifications
Every figure the makers publish. Search for one, or show only those that differ.
Dimensions
Performance
Weight
Engine
Hydraulics
Service capacities
Service intervals
Digging
Swing, travel and hydraulics
Sources: Cat 320 Hydraulic Excavator (Tier 3) brochure AEXQ2332-09 (2024, build 07G) · Komatsu PC400-8R brochure CEN00273-05 (Komatsu Middle East)
Drawn to scale
Side views measured off each maker's dimension drawing, front edges and ground lined up.
Cat 320 vs Komatsu PC400: questions
Which is bigger, the Cat 320 or Komatsu PC400?
By operating weight the Komatsu PC400 is the biggest at 41.7 t, then the Cat 320 at 21.3 t.
Which has more power, the Cat 320 or Komatsu PC400?
The Komatsu PC400: Cat 320 117 kW (157 hp), Komatsu PC400 257 kW (345 hp) (net power), a 120% difference.
Which digs deeper, the Cat 320 or Komatsu PC400?
The Komatsu PC400: Cat 320 6.72 m, Komatsu PC400 7.82 m (max digging depth), a 16% difference.
Which reaches further, the Cat 320 or Komatsu PC400?
The Komatsu PC400: Cat 320 9.86 m, Komatsu PC400 11.82 m (max reach at ground level), a 20% difference.
Which has the bigger bucket, the Cat 320 or Komatsu PC400?
The Komatsu PC400: Cat 320 1.19 m³, Komatsu PC400 1.9 m³ (bucket capacity), a 60% difference.
Which has the bigger fuel tank, the Cat 320 or Komatsu PC400?
The Komatsu PC400: Cat 320 345 L, Komatsu PC400 650 L (fuel tank), a 88% difference.
Which turns tighter, the Cat 320 or Komatsu PC400?
The Cat 320: Cat 320 2.83 m, Komatsu PC400 3.645 m (tail swing radius), a 22% difference.
Which is narrower to transport, the Cat 320 or Komatsu PC400?
The Cat 320: Cat 320 2.98 m, Komatsu PC400 3.43 m (overall width), a 13% 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.
