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HomeShips & VesselsThe Most Powerful and Largest Ship Engine in the World in 2022

The Most Powerful and Largest Ship Engine in the World in 2022

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What is The World’s Biggest and Most Powerful Combustion Engine in 2022?

The Wärtsilä RT-flex96C is a turbocharged, two-stroke reciprocating diesel engine designed to power large container ships and is the world’s largest engine. Built in the Aioi Works of Japan’s Diesel United, Ltd, it has a length of 27 metres (88 ft 7 in), is 13.5 metres (44 ft 4 in) high and weighs over 2,300 tonnes.

Using improved fuel injection methods, which have done away with traditional camshaft, chain gear, fuel pumps and hydraulic actuators, the power output of the 14 cylinder version has, in 2008, attained 84.42 Megawatts (114,800 bhp [brake horsepower]).

Thus it has achieved better performance with lower fuel consumption and lower harmful emissions. The engine powers the MV Emma Maersk, one of the world’s largest container ship.


Technical data


two-stroke diesel

straight engine, 6 to 14 cylinders

Bore960 mm (38 in)
Stroke2,500 mm (8.2 ft)
Displacement1828.7 litres

(111,597 CI) per cylinder

Engine speed15–102 RPM
Mean effective pressure1.96 MPa @ full load,

1.37 MPa @

maximum efficiency

(85% load)

Mean piston speed8.5 meters per second
Brake specific fuel consumption171 g/(kW·h)
PowerUp to 5,720 kW per cylinder,

34,320–80,080 kW (46,020–107,390 bhp) total

TorqueUp to 7,603,850 N⋅m

(5,608,310 lbf⋅ft) @ 102 rpm

Power density29.6–34.8 kW (39.7–46.7 bhp) per tonne, 2300 tonnes for the 14-cylinder version
Mass of fuel injected per cylinder per cycle~160 g (5.6 oz) @ full load

(Whole engine uses up to 250 tons of fuel per day.)

Crankshaft weight300 t (660,000 lb)
Piston weight5.5 t (12,000 lb)
Piston height6 m (20 ft)

world biggest engine 2022

In any case, you’ll need a very long ladder if you want to see the top of the engine as it’s three stories up in the air at around 45 feet. When it’s installed in a container ship it gains stairs and railings so that engineers and workers can move around the engine.

Engine capacity is equally impressive; 25,500 liters, as is the weight of the unit at 2300 tons.


The 14-cylinder version first entered commercial service in September 2006 aboard the Emma Mærsk. The design is similar to the older RTA96C engine, but with common rail technology (in place of traditional camshaft, chain gear, fuel pump and hydraulic actuator systems). This provides maximum performance at lower revolutions per minute (rpm), reduces fuel consumption and emits lower levels of harmful emissions.

The engine has crosshead bearings so the always-vertical piston rods create a tight seal under the pistons. Consequently, the lubrication of the engine is split: the cylinders and the crankcase use different lubricants, each being specialised for its designated role. The cylinders are lubricated by continuous timed injection of consumable lubricant, formulated to protect the cylinders from wear and to neutralise the acids formed during combustion of the high-sulfur fuels commonly used. The crosshead design reduces sideways forces on the piston, keeping diametral cylinder liner wear down to about 0.03 mm per 1000 hours.

Massive Turbocharger


This massive turbo belongs to one of the biggest and strongest engines in the world, the Wärtsilä RT-flex96C.



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