Head to head
Hitachi ZX145W-6 vs Kubota U55-4
The Hitachi ZX145W-6 has 71kW more power and is the bigger machine by 9.6 tonnes.
Last reviewed 13 September 2026
Key differences
- Engine power: the Hitachi ZX145W-6 has 71kW more power.
- Operating weight: the Hitachi ZX145W-6 is the bigger machine by 9.6 tonnes.
Specifications side by side
| Hitachi ZX145W-6 | Kubota U55-4 | |
|---|---|---|
| Operating weight | 15,000 - 17,200kg | 5400kg |
| Engine power | 105kW (ISO14396) | 46PS |
| Dig depth | 5,520 - 5,770mm | - |
Sources: Hitachi ZX145W-6, Kubota U55-4. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the ZX145W-6 if...
- you want one that has 71kW more power
- you want one that is the bigger machine by 9.6 tonnes
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 U55-4 if...
A midi excavator for groundworks, utilities and landscaping contractors. At 5.4 tonnes it arrives on a lorry rather than behind a car.
Listed by
- Yorkshire Plant Sales - Wakefield, Leeds
Common questions
What is the difference between the Hitachi ZX145W-6 and the Kubota U55-4?
The Hitachi ZX145W-6 has 71kW more power and is the bigger machine by 9.6 tonnes. The Hitachi ZX145W-6 is a 14-17 tonne wheeled excavator; the Kubota U55-4 is a midi excavator, 3 to 6 tonnes.
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