▁V 8 . ▁These ▁engines ▁were ▁produced ▁at ▁two ▁different ▁plants , ▁W inds or ▁and ▁Rome o . ▁A ▁" W " ▁in ▁the ▁V IN ▁ 8 th ▁digit ▁indicates ▁a ▁" R ome o " ▁engine , ▁while ▁an ▁" X " ▁indicates ▁a ▁" W inds or ". ▁ ▁The ▁W inds or ▁and ▁Rome o ▁have ▁subt le ▁differences . ▁Val ve ▁cover ▁b olt ▁patterns ▁are ▁one . ▁Rome o ▁has ▁fewer ▁bol ts ▁than ▁the ▁W inds or . ▁Another ▁difference ▁is ▁the ▁front ▁cover ▁bol ts . ▁The ▁W inds or ▁uses ▁ 8   mm ▁and ▁the ▁Rome o ▁uses ▁ 1 0   mm ▁bol ts . ▁The ▁Rome o ▁uses ▁jack ▁sc rew s ▁on ▁the ▁main ▁caps ▁and ▁the ▁W inds or ▁uses ▁dow els . ▁The ▁new ▁engine ▁produced ▁ ▁at ▁ 4 4 0 0   r pm ▁and ▁ ▁of ▁tor que ▁at ▁ 3 5 0 0   r pm , ▁matching ▁the ▁output ▁of ▁its ▁prede cess or . ▁For ▁ 1 9 9 8 , ▁the ▁ 4 . 6   L ▁V 8 ▁received ▁a ▁small ▁increase ▁in ▁output , ▁resulting ▁in ▁ ▁at ▁ 4 7 5 0   r pm ▁and ▁ ▁of ▁tor que ▁at ▁ 3 5 0 0   r pm . ▁This ▁was ▁achieved ▁through ▁PC M ▁cal ibration ▁and ▁a ▁modified ▁fuel ▁system . ▁Though ▁capable ▁of ▁matching ▁or ▁exceed ing ▁the ▁older ▁ 3 0 2