Champion 7500W Dual Fuel (100891) vs Firman T08071 Tri-Fuel 8000W
The Firman T08071 Tri-Fuel 8000W is the more powerful unit: 8,000 running watts against 7,500 — about 6% more capacity for the Firman T08071 Tri-Fuel 8000W. The Firman T08071 Tri-Fuel 8000W offers more fuel flexibility (gasoline, propane, natural gas) where the Champion 7500W Dual Fuel (100891) runs on gasoline and propane. The Firman T08071 Tri-Fuel 8000W runs longer at half load — 12 hours on its 8-gallon tank vs 10 hours.
| Champion 7500W Dual Fuel (100891) | Firman T08071 Tri-Fuel 8000W | |
|---|---|---|
| Type | portable | portable |
| Fuel | gasoline, propane | gasoline, propane, natural-gas |
| Running watts (gas / LP for standby) | 7500 W | 8000 W |
| Starting watts (gas) | 9375 W | 10000 W |
| Running watts (propane) | 6750 W | — |
| Starting watts (propane) | 8400 W | — |
| Runtime at 50% load (gas) | 10 h | 12 h |
| Fuel tank | 7.7 gal | 8 gal |
| Output voltage | 120/240V | 120/240V |
| Start type | electric | electric |
| Engine displacement | 439 cc | 439 cc |
| Weight | 205 lb | — |
| Warranty | 3 yr | — |
Frequently asked questions
Which is more powerful, the Champion 7500W Dual Fuel (100891) or the Firman T08071 Tri-Fuel 8000W?
The Firman T08071 Tri-Fuel 8000W, at 8,000 running watts on its best fuel versus 7,500 W. Remember that dual-fuel and natural-gas ratings are lower than gasoline ratings — the comparison table shows the published per-fuel figures.
Which costs less to run, the Champion 7500W Dual Fuel (100891) or the Firman T08071 Tri-Fuel 8000W?
Estimated fuel for 24 hours at about 50% load: $59 on gasoline for the Champion 7500W Dual Fuel (100891) vs $51 on gasoline for the Firman T08071 Tri-Fuel 8000W, at national average prices. These are spec-sheet-derived estimates — the assumptions are on the methodology page, and different fuels make this a cost comparison, not an efficiency ranking.
Where do these specifications come from?
Every record on BackupAtlas is hand-curated from manufacturer documentation and spec sheets, and each generator page links to its source document.