4 400–405 kw bi-fuel (ng/lp) generator models side by side — power, phase, sound level, weight and fuel tank capacity, compiled from manufacturer specification sheets.
| Model | Standby | Phase | Sound | Weight | Fuel tank |
|---|---|---|---|---|---|
| MTU MTU 12V0183 GS400 | 400.0 kW | — | — | — | — |
| Kohler 400REZX | 400.0 kW | 3 | 71.0 dBA | — | — |
| Kohler 400RZX | 400.0 kW | 3 | — | — | — |
| MTU 12V1600 GS400 | 400.0 kW | 1 or 3 | 90.5 dBA | 5645.0 kg | — |
Among 400–405 kW Bi-Fuel (NG/LP) generators in this comparison, the Kohler 400REZX is quietest at 71.0 dBA.
Not every model reports every spec — blanks mean the source document didn't state that figure, not that the value is zero.