Caterpillar 797

797F Caterpillar's flagship truck hauls a nominal 363 metric tons (400 short tons) a load behind a single 20-cylinder Cat C175-20 diesel rated at 4,000 gross horsepower. Where the BelAZ splits the work between two engines, the 797F does it with one, and it still reaches 39.5 mph loaded on its 59/80R63 tires. Fully loaded, it weighs about 624 metric tons. The F generation raised the payload by 20 short tons over the 797B it replaced, putting it level with the Liebherr and Komatsu rivals that follow.