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.
- Stihl MS 661 C-M MAGNUM Forestry / production felling and bucking larger trunks in sustained professional use (92 cc · 36-in bar)
- Stihl MS 881 MAGNUM Forestry / production felling and bucking larger trunks in sustained professional use (121 cc · 36-in bar)
Specs verified against the manufacturer spec sheet on — stihlusa.com.
Specs verified against the manufacturer spec sheet on — stihlusa.com.
| Spec | Stihl MS 661 C-M MAGNUM | Stihl MS 881 MAGNUM |
|---|---|---|
| Engine | ||
| Displacement | 5.6 cu in (91.8 cc) | 7.4 cu in (121.3 cc) |
| Engine Power | 7.3 hp | 8.7 hp |
| Fuel Capacity | 0.22 gal (0.85 L) | 0.34 gal (1.3 L) |
| Power | 5.4 kW | 6.4 kW |
| Power-to-Weight | 1.4 kg/kW | 1.5 kg/kW |
| Bar & Chain | ||
| Chain Gauge | 0.050 in | 0.063 in |
| Chain Pitch | 3/8" | .404" |
| Guide Bar Length | 35.98 in (914 mm) | 35.98 in (914 mm) |
| Oil Capacity | 13.5 fl oz (399.24 mL) | 23.67 fl oz (700 mL) |
| Dimensions & Weight | ||
| Length | 18.98 in (482 mm) | 21.65 in (550 mm) |
| System Weight | 23.19 lb (10.52 kg) | 28.73 lb (13.03 kg) |
| Weight | 16.8 lb (7.62 kg) | 21.41 lb (9.71 kg) |
| General | ||
| Power Source | gas | gas |