Jeep is a 4-wheeled drive multi-utility vehicle. You can call it the oldest SUV. It served military purposes in World War II very efficiently. Gradually, Jeep made roads in civilian society.  First civilian Jeep was introduced in late 1940s. Many Jeep variants serving similar military and civilian roles have since been created in other nations. Jeep is propelled by diesel and petrol both and have a very powerful engine to make it favourite for difficult terrains.