- Winterthur Gas & Diesel Ltd
- 63,840 kW megawatt(s)
- China (Shanghai)
The most powerful marine IC engine (otto cycle) commercially available is the WinGD 12X92DF, produced by Winterthur Gas & Diesel Ltd (Switzerland), with a power output of 63.840 MW, verified on 28 January 2022.
The 2,140-tonne engine demonstrated the power of 63,840 kW, at a speed of 80 rpm.