The world’s biggest engine is the Wartsila-Sulzer RTA96-C. It is a turbocharged two stroke diesel engine and it is the most powerful and efficient low revolution engine in the world today. The Wartsila-Sulser is manufactured by the Aioi Works in Japan and is part of Japans Diesel United Ltd engine manufacturers. Below is an 89 foot long 44 foot wide 12-cylinder engine, literally as big as a house!
