Husqvarna 545 Mark Ii vs Stihl Ms 251
Engine
| Engine Displacement | 50.1cc | 45.9cc |
| Power Output | 2.68kW | 2.2kW |
| Power Output (HP) | 3.6hp | 3hp |
| Idle Speed | 2800rpm | — |
| Maximum Speed | 9900rpm | — |
Cutting
| Recommended Bar Length | — | 45.7cm |
| Maximum Bar Length | 50.8cm | — |
| Chain Pitch | 0.325" | 0.325" |
| Chain Speed | 19.1m/s | — |
Weight
| Weight (without bar and chain) | 5.3kg | 4.81kg |
Tank
| Oil Tank Capacity | 0.32l | — |
Safety
| Sound Pressure Level | 106dB(A) | — |
| Sound Power Level | 115dB(A) | — |
| Vibration Front Handle | 4.0m/s² | — |
| Vibration Rear Handle | 4.6m/s² | — |
Classification
| Intended Use | Professional forestry and tree care | For homeowners and light duty work |
| Fuel Type | 2-stroke gasoline at 50:1 ratio | — |