Cummins QSB7-G5 vs Perkins 1206J-E70TTAG4
The Cummins QSB7-G5 and Perkins 1206J-E70TTAG4 are both diesel generator engines in a similar power class. Both are rated at roughly 220 kVA. Displacement is 6.7 L versus 7.01 L. The table below compares their full specifications side by side.
| Specification | Cummins QSB7-G5 | Perkins 1206J-E70TTAG4 |
|---|---|---|
| Headline rating | 220 kVA | 219 kVA |
| Standby (50 Hz) | 176 kWe | 175 kWe |
| Prime (50 Hz) | 160 kWe | 159 kWe |
| Standby (60 Hz) | 200 kWe | 200 kWe |
| Prime (60 Hz) | 180 kWe | 180 kWe |
| Displacement | 6.7 L | 7.01 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 3 | Euro Stage V / U.S. EPA Final Tier 4 |
| Dry weight | — | — |
| Origin | United States | United Kingdom |
Choosing between Cummins QSB7-G5 and Perkins 1206J-E70TTAG4
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 Cummins QSB7-G5 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.