* Marine Engines: Many marine engines dwarf the VW W12. For example, the Wärtsilä-Sulzer RTA96-C turbocharged two-stroke diesel engine is over 26 meters long and produces over 107,000 horsepower.
* Steam Engines: Historically, some steam engines were massive. The "Big Bertha" steam locomotive, for example, had a 6-foot diameter cylinder and was nearly 20 feet long.
* Aircraft Engines: Powerful engines are needed for flight, and some jet engines are massive. The Pratt & Whitney PW4000 series of engines, used on many wide-body aircraft, can produce over 100,000 pounds of thrust.
* Other Large Engines: Some other examples of very large engines include:
* The General Electric LM2500 gas turbine engine (used in power generation)
* The Rolls-Royce Trent 1000 jet engine (used on aircraft)
It's important to note that "biggest" can be subjective:
* Displacement: Some engines are bigger by displacement (the total volume of cylinders).
* Physical Size: Others are larger by physical dimensions.
* Power Output: Some engines are bigger by power output.
So, while the VW W12 is a notable engine, it's not the biggest engine in terms of displacement, physical size, or power output.
