Cummins VTA28G7 vs Perkins 4008TAG
The Cummins VTA28G7 and Perkins 4008TAG are both diesel generator engines in a similar power class. Both are rated at roughly 937 kVA. Displacement is 28 L versus 30 L. The table below compares their full specifications side by side.
| Specification | Cummins VTA28G7 | Perkins 4008TAG |
|---|---|---|
| Headline rating | 944 kVA | 929 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 755 kWe | 743 kWe |
| Prime (60 Hz) | — | 676 kWe |
| Displacement | 28 L | 30 L |
| Configuration | V12 | V8 |
| Cylinders | 12 | 8 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | India | India / United Kingdom |
Choosing between Cummins VTA28G7 and Perkins 4008TAG
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 VTA28G7 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.