10. M-4 Sherman (US)

First produced in 1942. Top speed: 24 mph. Range: 100 miles. The tank's radial nine-cylinder engine gives a power-to-weight ratio of 15.8 horsepower per ton. Armor thickness: 62 millimeters. Primary armament: 75-mm high-velocity gun.

The Sherman scored low on firepower and armor. Its Ford eight-cylinder engine was efficient and reliable, so the tank scored slightly better for mobility. But it is ease of manufacture that won the M-4 its place among the top 10 tanks: a staggering 48,000 of them were produced over just three years. Thus, the Sherman received a top production rating.