If it is for one or two people to travel in, the Suzuki Jimny is the way forward, mostly petrols but i think there is a diesel version of it, if it is for maybe four people to travel in the Vitara would be the way to go. I have owned a Jimny and it was minted to start with but when i needed more space for my dogs and other people i went bigger to a Ford Ranger. You dont actually say what purpose you want to have this small 4x4, for the fun of off-road driving the Jimny is the ultimate, check out youtube, type in " Garry @the pipe Drumclog " it is a bog standard Jimny with chunky tyres.