Cummins QSK23-G6 NR2 vs VMAN D30B4
The Cummins QSK23-G6 NR2 and VMAN D30B4 are both diesel generator engines in a similar power class. Both are rated at roughly 960 kVA. Displacement is 23.152 L versus 29.235 L. The table below compares their full specifications side by side.
| Specification | Cummins QSK23-G6 NR2 | VMAN D30B4 |
|---|---|---|
| Headline rating | 963 kVA | 956 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 771 kWe | 765 kWe |
| Prime (60 Hz) | 698 kWe | 675 kWe |
| Displacement | 23.152 L | 29.235 L |
| Configuration | L6 | V16 |
| Cylinders | 6 | 16 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Cummins QSK23-G6 NR2 and VMAN D30B4
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 QSK23-G6 NR2 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.