Buried deep inside the Ever Given is a Mitsui–MAN B&W 11G95ME-C9 two-stroke diesel engine. This engine reportedly makes 79,500 horsepower at a slow 79 rpm and is fed by heavy fuel oil or diesel. The engine drives a single propeller hanging off of the back of the ship that propels it to a speed of about 22.8 knots, or 26 mph. //

A selling point for the MAN B&W ME-C series is a compact size and electronic control. It can also run on other fuels like propane, natural gas, methanol or ethane. //

The most surprising part to me is piston diameter. It comes in at 95 cm, or 3.1 feet. For comparison, the largest engine in the world, the Wärtsilä RT-flex96C, has a piston diameter of 3.15 feet. //

We might criticise two stroke marine diesels, but they’re the most efficient non-hybridised engines around.

Yep! While researching this, I found that they’re good for 50 percent efficiency, which is pretty awesome.