Caterpillar G3520 vs MTU 20V4000 GS
The Caterpillar G3520 and MTU 20V4000 GS are both natural gas generator engines in a similar power class. Both are rated at roughly 3,147 kVA. Displacement is 84.2 L versus 95.3 L. The table below compares their full specifications side by side.
| Specification | Caterpillar G3520 | MTU 20V4000 GS |
|---|---|---|
| Headline rating | 3,125 kVA | 3,169 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 2,500 kWe | 2,535 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | — | — |
| Displacement | 84.2 L | 95.3 L |
| Configuration | V20 | V20 |
| Cylinders | 20 | 20 |
| Rated speed | 1,500 RPM | 1,500 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Stationary | Unregulated |
| Dry weight | — | — |
| Origin | United States | Germany |
Choosing between Caterpillar G3520 and MTU 20V4000 GS
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 20V4000 GS has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.