16. Jeep Willys MB
Off-road vehicles were once born out of necessity and the legendary Jeep Willys is the greatest example. Jeep conceived it just before World War II as a light military vehicle capable of going over any terrain, and withstanding bullets in addition to harsh conditions. This Jeep turned out to be one of the weapons that won the biggest war in history. The production of the original Jeep started in 1942. They called it the Willys MB or Ford GPW. The Willys was a simple yet incredibly tough and dependable car (via Jeep).

It got its power from a diminutive 2.2-liter four-cylinder producing only 60 HP. It used a simple four-wheel drive layout that was an innovative concept for the 1940s. Despite being a military vehicle, Jeep proved its worth after the war as a practical machine. Drivers could equip it to do numerous things like tow and plow for agricultural use. The unique concept of a rugged, compact, and capable off-road machine evolved to the entire Jeep brand, the biggest producer of off-road vehicles and SUVs.