Caterpillar CG170B-20 vs MTU 16V4000 GS
The Caterpillar CG170B-20 and MTU 16V4000 GS are both natural gas generator engines in a similar power class. The Caterpillar CG170B-20 is the higher-output unit (2,875 kVA vs 2,535 kVA). Displacement is 88.5 L versus 76.3 L. The table below compares their full specifications side by side.
| Specification | Caterpillar CG170B-20 | MTU 16V4000 GS |
|---|---|---|
| Headline rating | 2,875 kVA | 2,535 kVA |
| Standby (50 Hz) | — | — |
| Prime (50 Hz) | 2,300 kWe | 2,028 kWe |
| Standby (60 Hz) | — | — |
| Prime (60 Hz) | 2,300 kWe | — |
| Displacement | 88.5 L | 76.3 L |
| Configuration | V20 | V16 |
| Cylinders | 20 | 16 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Natural Gas | Natural Gas |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | Unregulated | Unregulated |
| Dry weight | — | — |
| Origin | Germany | Germany |
Choosing between Caterpillar CG170B-20 and MTU 16V4000 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 Caterpillar CG170B-20 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.