▁riv als . ▁ ▁By ▁ 1 9 9 0 , ▁V aux hall ▁was ▁prepar ing ▁to ▁launch ▁the ▁M K 3 ▁A stra , ▁and ▁its ▁first ▁ 4 X 4 ▁off - road ▁vehicle , ▁while ▁a ▁replacement ▁for ▁the ▁Nova ▁was ▁also ▁in ▁development . ▁▁ 1 9 9 0 ▁to ▁ 2 0 0 0 ▁ ▁In ▁ 1 9 9 1 , ▁V aux hall ' s ▁corpor ate ▁headquarters ▁were ▁moved ▁to ▁Griff in ▁House , ▁formerly ▁the ▁company ' s ▁design ▁and ▁testing ▁building . ▁In ▁the ▁same ▁year , ▁the ▁third - gener ation ▁V aux hall ▁A stra ▁went ▁on ▁sale ▁( with ▁Op el ▁versions ▁adopt ing ▁the ▁A stra ▁name plate ▁for ▁the ▁first ▁time ) ▁and ▁the ▁sal oon ▁version ▁bad ged ▁A stra ▁rather ▁than ▁Bel mont . ▁V aux hall ▁joined ▁forces ▁with ▁Is uz u ▁to ▁produce ▁the ▁F ron tera , ▁a ▁four - w heel ▁drive ▁off - ro ader ▁available ▁in ▁short - ▁and ▁long - w heel base ▁versions . ▁ ▁In ▁ 1 9 9 3 , ▁the ▁Caval ier ▁was ▁firm ly ▁re - est ab lished ▁as ▁Britain ' s ▁most ▁popular ▁large ▁family ▁car , ▁with ▁more ▁than ▁ 1 3 0 , 0 0 0 ▁sales , ▁while ▁the ▁third - gener ation ▁A stra ▁( re launch ed ▁in ▁ 1 9 9 1 ) ▁with ▁ 1 0 0 , 0 0 0 ▁sales ▁was ▁continu