It is actually called TaraHtelka (?????????? in Russian, noun from the verb ????????? - rattle, rumble; clatter) Their second car is Urchalka (???????, noun from the verb ?????? - rumble). The names comes from the sound it produce while moving: tarahtelka should be more loud due to the diesel engine while urchalka is almost like a cat's purr

PS: Oops, no Russian lettering is allowed anymore