Cummins QSB6.7-G31 vs Perkins 1506AE88TAG3
The Cummins QSB6.7-G31 and Perkins 1506AE88TAG3 are both diesel generator engines in a similar power class. Both are rated at roughly 282 kVA. Displacement is 6.7 L versus 8.8 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB6.7-G31 | Perkins 1506AE88TAG3 |
|---|---|---|
| Headline rating | 281 kVA | 283 kVA |
| Standby (50 Hz) | 225 kWe | 226 kWe |
| Prime (50 Hz) | 180 kWe | 206 kWe |
| Standby (60 Hz) | — | 256 kWe |
| Prime (60 Hz) | — | 232 kWe |
| Displacement | 6.7 L | 8.8 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,500 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | China | United States |
Choosing between Cummins QSB6.7-G31 and Perkins 1506AE88TAG3
Use this comparison as an engineering shortlist, then confirm the complete generator package against load profile, voltage, 50/60 Hz frequency, duty class, emissions rules, cooling margin, altitude, ambient temperature, enclosure design, controller features, and alternator sizing. The Perkins 1506AE88TAG3 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.