Board Thread:Game Discussion/@comment-29799506-20180216202957/@comment-28169398-20180218020707

Rr3daniel wrote: Quite a few career series can be done without owning all featured cars: Is it maybe your choice of the word done that we are confusing?
 * Battle Italia
 * Zenith
 * All Star Vendetta
 * Endurance King

It is possible that you mean earn enough trophies to progress in Career without owning all of the cars, in which case, the list is likely much longer than this one. However, then you wouldn't be including bonus series, as they have no effect on career progression.