Shipping goods from China to the U.S. is big business. And when we say big, we're talking 1,300-foot-long ships that weigh 170,974 tons. The cargo ships in question can carry 11,000 20-foot shipping containers at a breakneck speed of 31 knots.That's a lot more oomph than the typical 20-knot cruiser, and the reason for the extra push is the world's largest diesel engine. The 109,000-horsepower Wärtsilä-Sulzer RTA96-C, which first set sail in the Emma Mærsk in 2006, weighs in at a rotund 2,300 tons, and it's 44-feet tall and 90-feet long. In other words, the TRA96 is the height of a four-story building, and longer than a Christmas Eve line at Sam's Club. Within that massive exterior rests 14 cylinders that each consume 6.5-ounces of diesel fuel every cycle. And, if you like torque, there's enough twist to rip an M1 tank to shreds, though the massive mill churns at only 102 rpm.That's a lot of motor to ponder, and we'd be imagining the size of that camshaft, if it had one. This turbocharged two-stroke features common rail tech that utilizes a high-pressure fuel rail to supply fuel to individual solenoid valves. That means improved fuel economy and better performance, which is nothing short of essential in such a massive ship.So far there are 25 such engines patrolling the world's oceans, and another 86 are on the way. And since these mills can get a shipment from China to LA in four fewer days than their competitors, we wouldn't be surprised to see still more engines on the way.