▁longer ▁wheel base , ▁replacing ▁the ▁Br ough am . ▁The ▁States man ▁remains ▁not ew orth y ▁because ▁it ▁was ▁not ▁market ed ▁as ▁a ▁" Hold en ", ▁but ▁rather ▁a ▁" St ates man ". ▁ ▁The ▁H Q ▁framework ▁led ▁to ▁a ▁new ▁generation ▁of ▁two - door ▁Mon ar os , ▁and ▁despite ▁the ▁introduction ▁of ▁the ▁similar - s ized ▁compet itors , ▁the ▁H Q ▁range ▁became ▁the ▁top - s elling ▁Hold en ▁of ▁all ▁time , ▁with ▁ 4 8 5 , 6 5 0   un its ▁sold ▁in ▁three ▁years ; ▁ 1 4 , 5 5 8   un its ▁were ▁export ed ▁and ▁ 7 2 , 2 9 0   ▁ ▁C K D ▁k its ▁were ▁constructed . ▁The ▁H Q ▁series ▁was ▁fac el ift ed ▁in ▁ 1 9 7 4 ▁with ▁the ▁introduction ▁of ▁the ▁H J , ▁her ald ing ▁new ▁front - panel ▁sty ling ▁and ▁a ▁re vised ▁rear ▁fas cia . ▁This ▁new ▁body work ▁was ▁to ▁remain , ▁al beit ▁with ▁minor ▁up gr ades , ▁through ▁the ▁H X ▁and ▁H Z ▁series . ▁Det un ed ▁engines ▁ad her ing ▁to ▁government ▁emission ▁standards ▁were ▁brought ▁in ▁with ▁the ▁H X ▁series , ▁whilst ▁the ▁H Z ▁brought ▁consider ably ▁improved ▁road ▁handling ▁and ▁comfort ▁with ▁the ▁introduction ▁of ▁radial - t un ed ▁susp ension . ▁As ▁a ▁result ▁of ▁G M ' s ▁to ying ▁with