Cat 320 vs Cat 345
The Cat 345 is the heavier machine, at 42.2 t against 21.3 t, and the Cat 345 has more power (258 kW against 117 kW).
The Cat 320 is ahead on: turns tighter, narrower to transport, lower to transport. The Cat 345 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 Cat 345 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 | Cat 345 |
|---|---|---|
| Operating weight | 21,300 kg | 42,200 kg |
| Net powerHigher is better | 117 kW | 258 kW+121% |
| Max digging depthHigher is better | 6.72 m | 7.2 m+7% |
| Max reach at ground levelHigher is better | 9.86 m | 11.29 m+15% |
| Max dumping heightHigher is better | 6.49 m | 7.21 m+11% |
| Bucket capacityHigher is better | 1.19 m³ | 2.41 m³+103% |
| Bucket digging forceHigher is better | 150 kN | 235 kN+57% |
| Pump flowHigher is better | 429 L/min | 630 L/min+47% |
| Fuel tankHigher is better | 345 L | 600 L+74% |
| Tail swing radiusLower is better | 2.83 m+20% | 3.53 m |
| Overall widthLower is better | 2.98 m+11% | 3.34 m |
| Overall height (to top of cab)Lower is better | 2.96 m+8% | 3.23 m |
| Overall length | 9.53 m | 11.62 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
Undercarriage
Sources: Cat 320 Hydraulic Excavator (Tier 3) brochure AEXQ2332-09 (2024, build 07G) · Cat 345 Technical Specifications AEXQ4209-01 (12-2025, build 07H, Afr-ME / Aus-NZ / Eurasia / Indonesia / SE Asia) - all figures and the dimension drawing
Drawn to scale
Side views measured off each maker's dimension drawing, front edges and ground lined up.
Cat 320 vs Cat 345: questions
Which is bigger, the Cat 320 or Cat 345?
By operating weight the Cat 345 is the biggest at 42.2 t, then the Cat 320 at 21.3 t.
Which has more power, the Cat 320 or Cat 345?
The Cat 345: Cat 320 117 kW (157 hp), Cat 345 258 kW (346 hp) (net power), a 121% difference.
Which digs deeper, the Cat 320 or Cat 345?
The Cat 345: Cat 320 6.72 m, Cat 345 7.2 m (max digging depth), a 7% difference.
Which reaches further, the Cat 320 or Cat 345?
The Cat 345: Cat 320 9.86 m, Cat 345 11.29 m (max reach at ground level), a 15% difference.
Which has the bigger bucket, the Cat 320 or Cat 345?
The Cat 345: Cat 320 1.19 m³, Cat 345 2.41 m³ (bucket capacity), a 103% difference.
Which has the bigger fuel tank, the Cat 320 or Cat 345?
The Cat 345: Cat 320 345 L, Cat 345 600 L (fuel tank), a 74% difference.
Which turns tighter, the Cat 320 or Cat 345?
The Cat 320: Cat 320 2.83 m, Cat 345 3.53 m (tail swing radius), a 20% difference.
Which is narrower to transport, the Cat 320 or Cat 345?
The Cat 320: Cat 320 2.98 m, Cat 345 3.34 m (overall width), a 11% 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.
