Choosing between the CAT 320 and Komatsu PC200 is a common challenge. Both machines dominate the global 20-ton excavator market. However, each one excels in different job conditions. This guide compares the most widely traded variants, the CAT 320D (C6.4 ACERT) and the Komatsu PC200-8 (SAA6D107E-1), across specs, fuel cost, and resale value. Buyers exploring 20-ton excavators for sale will find this comparison especially useful for fleet decisions.
CAT 320D vs Komatsu PC200-8
The CAT 320D wins on machine weight (21,690 kg) and bucket capacity (up to 1.19 m³). It handles rock, demolition, and heavy breaking with more structural authority. The Komatsu PC200-8 wins on fuel economy (14.2 vs 16.5 L/hr) and ground pressure (38.2 vs 44.0 kPa). Notably, bucket digging forces are virtually identical, 148 kN vs 149 kN. Therefore, the real performance gap comes from mass, bucket size, and swing cycle speed.
Yonggong Pre-Export QC Standards
All units pass our proprietary five-point inspection before export.
| Inspection Item | CAT 320D Threshold | PC200-8 Threshold |
|---|---|---|
| Main pump relief pressure | ≥ 34.0 MPa | ≥ 36.0 MPa |
| Blowby gas pressure | < 6.0 kPa | < 6.0 kPa |
| Swing bearing play | < 1.8 mm | < 1.8 mm |
| Undercarriage remaining life | > 50% | > 50% |
| Track link wear | < 25 mm | < 25 mm |
These thresholds protect buyers from hidden mechanical degradation and ensure reliable post-shipment performance.
Technical Specification Matrix: CAT 320D vs. Komatsu PC200-8
| Specification | CAT 320D | Komatsu PC200-8 |
|---|---|---|
| Operating Weight | 21,690 kg | 20,000 kg |
| Engine | CAT C6.4 ACERT (6.4L, 6-cyl) | SAA6D107E-1 (6.69L, 6-cyl) |
| Net Power | 103 kW | 110 kW |
| Main Relief Pressure | 35.0 MPa | 37.3 MPa |
| Bucket Digging Force | 148 kN | 149 kN |
| Ground Bearing Pressure | 44.0 kPa | 38.2 kPa |
The Komatsu produces slightly more raw power (110 kW). Meanwhile, the CAT counters with greater mass-backed digging leverage. For full technical details, review the Komatsu PC200 specs before making a final call.
Clarifying the CAT 320 Lineage
The CAT 320 brand spans multiple distinct engine generations. Buyers must confirm the exact generation before comparing specifications.
- 320D — 6.4L CAT C6.4 ACERT (6-cylinder, 103 kW), highest global resale volume
- 320D2 — 7.1L CAT C7.1 ACERT (6-cylinder, 118 kW), higher output, less common used stock
- Next Gen 320 / 320 GC — 4.4L CAT C4.4 ACERT (4-cylinder, 108 kW), full electro-hydraulic controls
This article focuses strictly on the 320D, since it represents the largest share of used inventory worldwide. For machine photos and current stock, see our used CAT 320 excavators.
Structural Rigidity vs. Dynamic Cycle Time
CAT 320D: Counterweight Leverage & Rock Durability
The CAT 320D carries a heavier counterweight and a reinforced X-frame undercarriage. Consequently, it handles a 1.19 m³ bucket or a 140 mm hydraulic breaker without excessive torsional vibration. This makes it ideal for quarry blasting clean-up, rock face trimming, and hard-pan excavation. Teams seeking this level of structural durability should explore used CAT 320DL for export-ready options.
Komatsu PC200-8: CLSS Responsiveness & Trenching Speed
The PC200-8 uses Komatsu’s Closed-Load Sensing System (CLSS), which delivers precise, demand-based hydraulic flow. As a result, swing and leveling responses feel noticeably sharper. Its average swing cycle time of 11.8 seconds beats the CAT 320D’s 12.6 seconds. For pipeline trenching or finish grading, this translates directly into higher daily output.
Related reading: CAT 320D vs Volvo EC210B — specs, hydraulic performance, real-world pricing and maintenance costs compared side by side.
Related reading: Komatsu PC200 vs Sany SY215C — specs, hydraulic performance, real-world pricing and maintenance costs compared side by side.
Secondary Market Pricing & Resale Liquidity
| Hours Range | Used CAT 320D | Used Komatsu PC200-8 |
|---|---|---|
| 1,500 – 3,500 hrs | $52,000–$68,000 | $48,000–$62,000 |
| 4,000 – 7,000 hrs | $38,000–$52,000 | $35,000–$48,000 |
| 8,000+ hrs | $18,000–$28,000 | $16,000–$25,000 |
The CAT 320D holds slightly stronger resale values. This is largely because of its dense global dealer network. However, the Komatsu PC200-8 offers better parts accessibility in Africa, Southeast Asia, and the Middle East. Both machines show healthy resale liquidity. For deeper pricing benchmarks, check the CAT 320 price guide for current export-market data.
Frequently Asked Questions
Q: Which excavator is better suited for rock and quarry work, CAT 320D or Komatsu PC200-8?
— The CAT 320D holds a clear structural advantage in heavy rock work. It uses its 21,690 kg operating weight and reinforced X-frame chassis to absorb breaker shock loads effectively. Notably, bucket digging forces are nearly tied at 148 kN vs 149 kN. Therefore, the CAT’s edge comes from mass and frame rigidity, not raw cutting force.
Q: How much fuel does the Komatsu PC200-8 save compared to the CAT 320D?
— The Komatsu PC200-8 consumes roughly 14.2 L/hr under standard digging conditions. The CAT 320D burns approximately 16.5 L/hr by comparison. This 2.3 L/hr difference saves operators around $4,370 annually over 2,000 working hours at standard diesel rates.
Q: What is the typical price difference between a used CAT 320D and Komatsu PC200-8?
— At mid-life condition (around 5,000 hours), a used CAT 320D typically sells between $38,000 and $52,000. An equivalent Komatsu PC200-8 ranges from $35,000 to $48,000. That makes the Komatsu approximately 8% more affordable at the point of purchase.
Q: Is the CAT 320 Next Gen engine identical to the older CAT 320D?
— No, the two use entirely different engines. The CAT 320D runs a 6.4L 6-cylinder C6.4 ACERT engine producing 103 kW. In contrast, the Next Gen 320 and 320 GC use a 4.4L 4-cylinder C4.4 ACERT engine producing 108 kW with fully electronic electro-hydraulic controls.
Q: Which machine performs better in soft, muddy ground conditions?
— The Komatsu PC200-8 performs significantly better on soft or waterlogged ground. Its ground bearing pressure of 38.2 kPa is well below the CAT 320D’s 44.0 kPa. Consequently, the PC200-8 floats more reliably on swampy or rain-saturated job sites without sinking or losing traction.
