The world's largest engine is the Wärtsilä RT-flex96C, regarded as the largest and most powerful diesel engine currently in existence. It's a two-stroke turbocharged diesel engine designed by the Finnish manufacturer Wärtsilä specifically for large container ships. The 14-cylinder version of the RT-flex96C is 13.5 meters high, 26.59 meters long, weighs over 2,300 tonnes, and produces around 80.08 megawatts (approx. 107,389 horsepower) [1][4].

This engine is primarily used in massive vessels, such as the Emma Mærsk, which can transport 11,000 shipping containers at speeds of up to 31 knots. Each of its cylinders consumes 6.5 ounces of diesel per cycle [1][5]. The Wärtsilä RT-flex96C's design includes advanced common rail fuel injection, which enhances efficiency and lowers emissions, leading to its designation as one of the least polluting engines of its kind [1][4][5].

The Wärtsilä RT-flex96C: The World's Largest Diesel Engine

This is what 109,000 horse power looks like - meet the biggest engine in the world

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The Wärtsilä RT-flex96C: The World's Largest Diesel Engine

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