The M2A2 Bradley Fighting Vehicle is a light armoured personnel vehicle that is designed to be fast. The standard 24.9-ton Bradley is powered by a 500-horsepower, supercharged, eight-cylinder, liquid-cooled diesel engine, giving it enough power to keep up with other armoured vehicles like the M1 Abrams tanks. With a power-to-weight ratio of 20 horsepower per ton, the Bradley can reach a top speed of 40 miles per hour (64.4 kph) on paved roads. In comparison, the M1 Abrams tank is powered by a 1,500-horsepower engine and travels at 30 mph (48.3 kph). The Bradley models have a fuel capacity of between 175 gallons and 197 gallons (662-746 litres). The Bradley is designed to cross any terrain, even water, and can transition to amphibious mode in five minutes. The tracks propel the Bradley through the water at a top speed of about 4 mph (6.4 km/hr).