ories ▁at ▁the ▁Mount ▁Pan or ama ▁Circ uit ▁in ▁Bath urst , ▁New ▁South ▁Wales . ▁ ▁In ▁ 1 9 7 5 , ▁Hold en ▁introduced ▁the ▁compact ▁Gem ini , ▁the ▁Australian ▁version ▁of ▁the ▁" T - car ", ▁based ▁on ▁the ▁Op el ▁K ad ett ▁C . ▁The ▁Gem ini ▁was ▁an ▁over se as ▁design ▁developed ▁joint ly ▁with ▁Is uz u , ▁G M ' s ▁Japanese ▁affili ate ; ▁and ▁was ▁power ed ▁by ▁a ▁ 1 . 6 - lit re ▁four - cy l inder ▁engine . ▁Fast ▁becoming ▁a ▁popular ▁car , ▁the ▁Gem ini ▁rapidly ▁att ained ▁sales ▁leadership ▁in ▁its ▁class , ▁and ▁the ▁name plate ▁lived ▁on ▁until ▁ 1 9 8 7 . ▁ ▁Hold en ' s ▁most ▁popular ▁car ▁to ▁date , ▁the ▁Com mod ore , ▁was ▁introduced ▁in ▁ 1 9 7 8 ▁as ▁the ▁VB . ▁The ▁new ▁family ▁car ▁was ▁lo os ely ▁based ▁on ▁the ▁Op el ▁Re kord ▁E ▁body ▁shell , ▁but ▁with ▁the ▁front ▁from ▁the ▁Op el ▁Senator ▁gra ft ed ▁to ▁accommod ate ▁the ▁larger ▁Hold en ▁six - cy l inder ▁and ▁V 8 ▁engines . ▁Initial ly , ▁the ▁Com mod ore ▁maintained ▁Hold en ' s ▁sales ▁leadership ▁in ▁Australia . ▁However , ▁some ▁of ▁the ▁comprom ises ▁resulting ▁from ▁the ▁ad option ▁of ▁a ▁design ▁intended ▁for ▁another ▁market ▁ham per ed ▁the ▁car ' s ▁accept ance . ▁In ▁particular