▁L ▁Es sex ▁V 4 ▁and ▁the ▁ 3 . 0 ▁L ▁Es sex ▁V 6 ▁in ▁fact ▁have ▁exactly ▁the ▁same ▁bore ▁and ▁stroke ▁and ▁share ▁various ▁components . ▁ ▁History ▁The ▁Es sex ▁V 4 ▁and ▁V 6 ▁were ▁mainly ▁designed ▁to ▁replace ▁the ▁out dated ▁and ▁ag ing ▁inline - four ▁and ▁six - cy l inder ▁Ford ▁Ze ph yr ▁engine . ▁It ▁was ▁produced ▁in ▁four ▁capac ities : ▁, ▁, ▁, ▁, ▁with ▁the ▁ 3 . 0 - lit re ▁version ▁being ▁the ▁most ▁common ▁and ▁widely ▁used . ▁These ▁engines ▁were ▁fitted ▁to ▁a ▁wide ▁range ▁of ▁vehicles , ▁from ▁Ford ▁Trans it ▁v ans ▁to ▁sed ans , ▁coup és ▁like ▁the ▁Ford ▁Cap ri ▁and ▁sports ▁cars ▁like ▁TV R ▁and ▁Mar cos . ▁The ▁earlier ▁versions ▁of ▁engine ▁were ▁r ated ▁at ▁ ▁and ▁ ▁of ▁tor que , ▁around ▁October ▁ 1 9 7 1 ▁the ▁engine ▁was ▁re vised ▁by ▁modifying ▁the ▁cam sh aft ▁and ▁cyl inder ▁heads ▁that ▁improved ▁the ▁power ▁and ▁tor que ▁to ▁produce ▁ ▁S AE ▁or ▁ ▁D IN ▁at ▁ 5 0 0 0   r pm ▁and ▁ ▁S AE ▁or ▁ ▁D IN ▁of ▁tor que ▁at ▁ 3 0 0 0   r pm . ▁At ▁the ▁same ▁time , ▁the ▁oil ▁dip st ick ▁was ▁moved ▁from ▁the ▁front ▁of ▁the ▁engine ▁to ▁the ▁side , ▁the ▁in let ▁manifold ▁was ▁improved ▁from ▁earlier ▁models , ▁and ▁the ▁compression