Caterpillar C18 vs Liebherr D976
The Caterpillar C18 and Liebherr D976 are both diesel generator engines in a similar power class. Both are rated at roughly 780 kVA. Displacement is 18.13 L versus 18 L. The table below compares their full specifications side by side.
| Specification | Caterpillar C18 | Liebherr D976 |
|---|---|---|
| Headline rating | 780 kVA | 780 kVA |
| Standby (50 Hz) | 624 kWe | 624 kWe |
| Prime (50 Hz) | 564 kWe | 556.8 kWe |
| Standby (60 Hz) | 750 kWe | — |
| Prime (60 Hz) | 680 kWe | — |
| Displacement | 18.13 L | 18 L |
| Configuration | L6 | L6 |
| Cylinders | 6 | 6 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel/HVO |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Euro Stage V / U.S. EPA Tier 2 |
| Dry weight | — | — |
| Origin | United States | Switzerland |
Choosing between Caterpillar C18 and Liebherr D976
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.