Caterpillar C6.6 vs Weichai WP4.6ND138E310
The Caterpillar C6.6 and Weichai WP4.6ND138E310 are both diesel generator engines in a similar power class. Both are rated at roughly 156 kVA. Displacement is 6.6 L versus 4.6 L. The table below compares their full specifications side by side.
| Specification | Caterpillar C6.6 | Weichai WP4.6ND138E310 |
|---|---|---|
| Headline rating | 156 kVA | 155 kVA |
| Standby (50 Hz) | 125 kWe | 124 kWe |
| Prime (50 Hz) | 113 kWe | 112 kWe |
| Standby (60 Hz) | 150 kWe | — |
| Prime (60 Hz) | 136 kWe | — |
| Displacement | 6.6 L | 4.6 L |
| Configuration | L6 | L4 |
| Cylinders | 6 | 4 |
| Rated speed | 1,500 / 1,800 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 3 | China National Stage III / Unregulated |
| Dry weight | — | — |
| Origin | United States | China |
Choosing between Caterpillar C6.6 and Weichai WP4.6ND138E310
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 C6.6 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.