That's because you won't find this massive engine under the hood of a sports car — instead, you'll find it inside the belly of a massive cargo ship. The Wärtsilä 14RT-flex96C is the largest ...

The superyacht will offer 54 suites, including a presidential suite spanning 15,230 square feet with a private terrace.

Engines on the world's biggest ships can be as tall as a four-storey house, and as wide as three London buses. So a lot of fuel is required, which in turn creates a large amount of CO2.