Caterpillar 3606 vs MTU MTU 20V4000 G23
The Caterpillar 3606 and MTU MTU 20V4000 G23 are both diesel generator engines in a similar power class. Both are rated at roughly 2,706 kVA. Displacement is 110.8 L versus 95.4 L. The table below compares their full specifications side by side.
| Specification | Caterpillar 3606 | MTU MTU 20V4000 G23 |
|---|---|---|
| Headline rating | 2,688 kVA | 2,723 kVA |
| Standby (50 Hz) | 2,150 kWe | 2,178 kWe |
| Prime (50 Hz) | 1,940 kWe | 1,980 kWe |
| Standby (60 Hz) | 2,000 kWe | — |
| Prime (60 Hz) | 1,820 kWe | — |
| Displacement | 110.8 L | 95.4 L |
| Configuration | L6 | V20 |
| Cylinders | 6 | 20 |
| Rated speed | 1,000 / 1,200 RPM | 1,500 RPM |
| Fuel | Diesel | Diesel |
| Cooling | Liquid-Cooled | Liquid-Cooled |
| Emissions | U.S. EPA Tier 2 | Unregulated |
| Dry weight | — | — |
| Origin | United States | Germany |
Choosing between Caterpillar 3606 and MTU MTU 20V4000 G23
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 20V4000 G23 has the higher headline kVA rating in this pair, but site conditions and duty cycle can still change the final recommendation.