Which car is the best car in the world?

Depends:

for looks, most of the old LANCIA range, mainly the fulvia and stratos

4x4: GQ nissan patrol 4.2D ( these just keep on going and never break)

family car: anything made by GM (in Australia, the holden commodore)

most major brands like Toyota, nissan, honda, suzuki are good, but dont get caught in a crap box like, great wall, or ssangyong or even kia.

also, the earlier Hyundai range was absoulute rubbish, but they have improved now