1: T-34 (USSR) (US) First produced in 1940. Top speed: 34 mph. Range: 268 miles. The four-stroke 12-cylinder diesel engine gives a power-to-weight ratio of 15.87 horsepower per ton. Armor thickness: 65 millimeters Primary armament: 76.2-mm gun.
Tanks ! I'd say the M1 Abrams is the best off road vehicle ever, may not be the fastest machine ever but nothing can stop that thing :) it would probably just blow a mountain flat and cruise right over, id like to see a jeep or truck do that ;)