Perkins 4008TAG vs VMAN D22.1
The Perkins 4008TAG and VMAN D22.1 are both diesel generator engines in a similar power class. Both are rated at roughly 933 kVA. Displacement is 30 L versus 21.927 L. The table below compares their full specifications side by side.
| Specification | Perkins 4008TAG | VMAN D22.1 |
|---|---|---|
| Headline rating | 929 kVA | 936 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | — | — |
| Standby (60 Hz) | 743 kWe | 749 kWe |
| Prime (60 Hz) | 676 kWe | 680 kWe |
| Displacement | 30 L | 21.927 L |
| Configuration | V8 | V12 |
| Cylinders | 8 | 12 |
| Rated speed | 1,800 RPM | 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | India / United Kingdom | China |
Choosing between Perkins 4008TAG and VMAN D22.1
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 VMAN D22.1 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.