Home / Compare
Comparison
2 models side by side, spec by spec.
Independent reference database. Specs are compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.
Best suited for
Each model's factual fit, from its duty class and key specs — no winner declared.
- Echo CS-620PW Farm & ranch occasional firewood, limbing, fence-line clearing, and storm cleanup (60 cc · 16-in bar)
- Stihl MS 391 Forestry / production felling and bucking larger trunks in sustained professional use (64 cc · 18-in bar)
Specs verified against the manufacturer spec sheet on — echo-usa.com.
Specs verified against the manufacturer spec sheet on — stihlusa.com.
| Spec | Echo CS-620PW | Stihl MS 391 |
|---|---|---|
| Engine | ||
| Displacement | 3.65 cu in (59.8 cc) | 3.91 cu in (64.1 cc) |
| Engine Power | — | 4.4 hp |
| Fuel Capacity | 0.17 gal (0.65 L) | 0.16 gal (0.6 L) |
| Power | — | 3.3 kW |
| Power-to-Weight | — | 1.9 kg/kW |
| Bar & Chain | ||
| Chain Gauge | — | 0.050 / 0.063 in |
| Chain Pitch | — | 3/8" |
| Guide Bar Length | 15.98 in (406 mm) | 17.99 in (457 mm) |
| Oil Capacity | 10.2 fl oz (301.65 mL) | 11.8 fl oz (348.97 mL) |
| Oiler | Automatic/Adjustable (Clutch-Driven) | — |
| Dimensions & Weight | ||
| Length | — | 18.03 in (458 mm) |
| System Weight | — | 16.73 lb (7.59 kg) |
| Weight | 14.11 lb (6.4 kg) | 13.67 lb (6.2 kg) |
| General | ||
| Anti-Vibration | Yes | — |
| Power Source | gas | gas |
| Warranty | 5 yr | — |