MTU MTU 12V4000 G14S vs Perkins 4012-46TAG3A
The MTU MTU 12V4000 G14S and Perkins 4012-46TAG3A are both diesel generator engines in a similar power class. Both are rated at roughly 1,881 kVA. Displacement is 57.2 L versus 46 L. The table below compares their full specifications side by side.
| Specification | MTU MTU 12V4000 G14S | Perkins 4012-46TAG3A |
|---|---|---|
| Headline rating | 1,881 kVA | 1,880 kVA |
| Standby (50 Hz) | — | 1,504 kWe |
| Prime (50 Hz) | — | 1,368 kWe |
| Standby (60 Hz) | 1,505 kWe | 1,504 kWe |
| Prime (60 Hz) | 1,368 kWe | 1,368 kWe |
| Displacement | 57.2 L | 46 L |
| Configuration | V12 | V12 |
| Cylinders | 12 | 12 |
| Rated speed | 1,800 RPM | 1,500 / 1,800 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | Germany | United Kingdom |
Choosing between MTU MTU 12V4000 G14S and Perkins 4012-46TAG3A
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 MTU MTU 12V4000 G14S has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.