Head to head
Mecalac 9MDX vs Yanmar ViO57-6B
The Mecalac 9MDX has 219kW more power. The Yanmar ViO57-6B is the bigger machine by 170kg.
Last reviewed 13 September 2026
Key differences
- Engine power: the Mecalac 9MDX has 219kW more power.
- Operating weight: the Yanmar ViO57-6B is the bigger machine by 170kg.
Specifications side by side
| Mecalac 9MDX | Yanmar ViO57-6B | |
|---|---|---|
| Operating weight | 5315 kg (11718 lb) to 5715 kg (12600 lb) | 5485 kg |
| Engine power | 55,4 kW (74 hp) | 33,5 kW (at 2200 rpm) |
| Payload | 9000 kg | - |
| Travel speed | 25 km/h | - |
| Breakout force | - | 41,9 kN |
| Fuel tank | - | 66 l |
Sources: Mecalac 9MDX, Yanmar ViO57-6B. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the 9MDX if...
- you want one that has 219kW more power
A 9 tonne dumper with a fully enclosed ROPS/FOPS cab for bulk earthmoving, civils and road works on UK sites. Available with front tip or swivel skip.
Full 9MDX specifications →Buy or hire the ViO57-6B if...
- you want one that is the bigger machine by 170kg
A 5 to 6 tonne zero-tail swing digger for civils and groundworks contractors on deeper trenching, pipe laying and loading. Hire fleets use it where space is tight but a bigger machine is needed.
Full ViO57-6B specifications →Common questions
What is the difference between the Mecalac 9MDX and the Yanmar ViO57-6B?
The Mecalac 9MDX has 219kW more power. The Yanmar ViO57-6B is the bigger machine by 170kg. The Mecalac 9MDX is a 9 tonne cabbed site dumper; the Yanmar ViO57-6B is a 5.5 tonne zero-tail mini excavator.
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