Wärtsilä 25 / 25DF / 25 Ammonia
Medium-speed engine of 1.9–3.4 MW (6L–9L) in diesel, dual-fuel and ammonia versions.
The Wärtsilä 25 is offered as diesel, as the 25DF dual-fuel (diesel/LNG) and as the Wärtsilä 25 Ammonia, the company's first commercial four-stroke ammonia engine. Output is 1.9–3.4 MW from 6L to 9L configurations at 900 or 1,000 rpm. Target vessels include short-sea merchant ships, PSVs and LNG bunkering vessels.
Specifications
- Power kW min
- 1,900
- Power kW max
- 3,400
- Speed rpm
- 900/1000
- Cylinders
- 6–9 (inline)
- Fuels
- MGO, HFO, LNG (DF), ammonia
Listed under
More from Wärtsilä
Wärtsilä
Wärtsilä 20 / 20DF / 20 Methanol
Compact engine of 740–1,980 kW (20DF 870–1,755 kW) for auxiliary gensets and small propulsion; methanol version in development.
Wärtsilä
Wärtsilä 31 / 31DF / 31SG / 31 Methanol
High-efficiency engine of 4.6–10.4 MW (650 kW/cyl diesel) in diesel, dual-fuel, pure-gas and methanol versions.
Wärtsilä
Wärtsilä 32 / 32 Methanol
Widely deployed medium-speed engine; the 32 Methanol (3.4–5.2 MW) launched in 2022, first deliveries 2023.
Wärtsilä
Wärtsilä 34DF
Fuel-flexible dual-fuel engine with 500 kW/cyl (up to 8 MW) for small LNG carriers, OSVs, tugs and gensets.
Wärtsilä
Wärtsilä 46F / 46DF / 46F Methanol
Large-bore 600 rpm engine of 7.5–20 MW in diesel, dual-fuel, methanol-ready and methanol versions.
Wärtsilä
Wärtsilä 46TS-DF / 46TS Methanol
Two-stage turbocharged 600 rpm dual-fuel engine of 7.8–20.8 MW (1,300 kW/cyl); methanol version 8.1–21.6 MW.
Wärtsilä
Wärtsilä HY
Integrated hybrid combining engine, PTO/PTI drives, energy storage and energy management; up to 25% annual fuel savings claimed.
Wärtsilä
Wärtsilä electrical & power systems
Power drives, DC-hub power distribution and energy management for hybrid and electric vessels.