Head to head
Genie Z-45/25J RT vs Komatsu D51PX
The Komatsu D51PX is the bigger machine by 7,665kg.
Last reviewed 13 September 2026
Key differences
- Operating weight: the Komatsu D51PX is the bigger machine by 7,665kg.
Specifications side by side
| Genie Z-45/25J RT | Komatsu D51PX | |
|---|---|---|
| Operating weight | 6,515kg | 14,180kg |
| Working height | 15.86m (51ft 6in) maximum | - |
| Platform height | 13.86m (45ft 6in) maximum | - |
| Platform capacity | 227kg unrestricted | - |
| Class | - | 14 tonne |
Sources: Genie Z-45/25J RT, Komatsu D51PX. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Z-45/25J RT if...
A widely hired rough-terrain boom for construction and outdoor maintenance. The articulating up-and-over jib is what separates it from a straight telescopic boom: it reaches over an obstacle rather than only to it, which is often the entire requirement.
Full Z-45/25J RT specifications →Buy or hire the D51PX if...
- you want one that is the bigger machine by 7,665kg
A mid-size dozer built with wider, low ground pressure tracks for soft or wet ground. Groundworks and landfill contractors choose the PX variant over a standard-track D51 where the ground itself would otherwise bog a machine down.
Listed by
- B & T Plant Hire - Gravesend
- B & T Plant Hire Ltd - Morden
Common questions
What is the difference between the Genie Z-45/25J RT and the Komatsu D51PX?
The Komatsu D51PX is the bigger machine by 7,665kg. The Genie Z-45/25J RT is a rough terrain articulating boom lift; the Komatsu D51PX is a low ground pressure crawler dozer, 14 tonne class.
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