Caterpillar 797F: 106 liters

A massive 20-cylinder 106-liter C175-20 diesel engine in the Caterpillar 797F gives nearly 4000bhp and a massive torque output of 16,474 lb-ft and is the largest land vehicle found in any current earth moving equipment. Other engines in the sector act as generators for electric motors, this vehicle powers the rear wheels through a seven-speed automatic gearbox.