Aside from kahawe's excellent comment, one doesn't necessarily need figures here. Can't I be a primary source for this? I think anyone who has visited india/china can probably tell you that car owners are definitely upper class.
This also holds true across other Asian countries - car ownership is common only in upper-middle class and really rich families; and for very rich Chinese families the really expensive part is the license plate and not the car... no 4s and the more 8s and 9s, the more expensive the plate.
source?