Head to head
Hitachi ZX145W-6 vs Hitachi ZX225US-7
The Hitachi ZX225US-7 is the bigger machine by 9.8 tonnes and has 23kW more power.
Last reviewed 13 September 2026
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Key differences
- Operating weight: the Hitachi ZX225US-7 is the bigger machine by 9.8 tonnes.
- Engine power: the Hitachi ZX225US-7 has 23kW more power.
Specifications side by side
| Hitachi ZX145W-6 | Hitachi ZX225US-7 | |
|---|---|---|
| Operating weight | 15,000 - 17,200kg | 24,800 - 29,100kg |
| Dig depth | 5,520 - 5,770mm | 6,120mm |
| Engine power | 105kW (ISO14396) | 128.4kW (ISO14396) / 122kW (ISO9249) |
Sources: Hitachi ZX145W-6, Hitachi ZX225US-7. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the ZX145W-6 if...
Suits municipal and utility contractors who need a mobile, road-going digger for drainage and reinstatement work spread across several sites in a day. The wheeled undercarriage trades some stability for speed between jobs.
Listed by
- McGovern Plant Hire - Hounslow, Cranford
Buy or hire the ZX225US-7 if...
- you want one that is the bigger machine by 9.8 tonnes
- you want one that has 23kW more power
For contractors working in restricted yards or alongside live structures who still need the dig performance of a 20-tonne-plus machine. The reduced tail swing keeps the counterweight closer to the tracks than a standard crawler excavator of this size.
Listed by
- McGovern Plant Hire - Hounslow, Cranford
Common questions
What is the difference between the Hitachi ZX145W-6 and the Hitachi ZX225US-7?
The Hitachi ZX225US-7 is the bigger machine by 9.8 tonnes and has 23kW more power. The Hitachi ZX145W-6 is a 14-17 tonne wheeled excavator; the Hitachi ZX225US-7 is a 22-29 tonne reduced-tail-swing medium excavator.
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