Cummins QSK50-G5 vs Perkins 401246TAG4A
The Cummins QSK50-G5 and Perkins 401246TAG4A are both diesel generator engines in a similar power class. Both are rated at roughly 1,917 kVA. Displacement is 50.3 L versus 46 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK50-G5 | Perkins 401246TAG4A |
|---|---|---|
| Headline rating | 1,910 kVA | 1,923 kVA |
| Standby (50 Hz) | — | 1,538 kWe |
| Prime (50 Hz) | — | 1,401 kWe |
| Standby (60 Hz) | 1,528 kWe | — |
| Prime (60 Hz) | 1,366 kWe | — |
| Displacement | 50.3 L | 46 L |
| Configuration | V16 | V12 |
| Cylinders | 16 | 12 |
| Rated speed | 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | — |
| Origin | United States | India / United Kingdom |
Choosing between Cummins QSK50-G5 and Perkins 401246TAG4A
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 401246TAG4A has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.