4-letter car names are very common

Why? There is FIAT, SEAT, SAAB, JEEP, Lada, Alfa (romeo), Audi, FORD, Mini (of course), Opel, Tata, Benz, and .... now IKEA? See photo to the left. Any theories on why 4-letter names are so common and any thoughts on how to put the IKEA car together? Note that you got one tool in your kit. (link)