▁of ▁cyl ind ers ▁could ▁be ▁hous ed ▁in ▁an ▁engine ▁block ▁with ▁a ▁single ▁cyl inder ▁head , ▁like ▁a ▁straight ▁engine . ▁A ▁determ ining ▁characteristic ▁was ▁the ▁use ▁of ▁overhead ▁cam sh aft s ▁( e ither ▁single ▁or ▁double ), ▁in ▁which ▁a ▁cam sh aft ▁would ▁serve ▁the ▁same ▁function ▁for ▁all ▁cyl ind ers ▁— ▁in ▁both ▁cyl inder ▁banks . ▁ ▁L ambda ▁ ▁The ▁first ▁V 4 ▁was ▁used ▁in ▁the ▁L ambda ▁from ▁ 1 9 2 2 ▁through ▁ 1 9 3 1 . ▁It ▁was ▁a ▁ 2 0 ° ▁narrow - angle ▁al umin um ▁design . ▁All ▁three ▁engine ▁disp lac ements ▁shared ▁the ▁same ▁long ▁ ▁stroke , ▁and ▁all ▁were ▁SO HC ▁designs ▁with ▁a ▁single ▁cam sh aft ▁serving ▁both ▁banks ▁of ▁cyl ind ers . ▁ ▁Eng ines : ▁▁ ▁, ▁ ▁at ▁ 3 2 5 0   r pm ▁▁ ▁, ▁ ▁at ▁ 3 2 5 0   r pm ▁▁ ▁, ▁ ▁at ▁ 3 5 0 0   r pm ▁ ▁Arten a ▁The ▁L ambda ▁engine ▁was ▁updated ▁for ▁the ▁Arten a . ▁B ore ▁was ▁set ▁at ▁ ▁as ▁in ▁the ▁ 2 . 6   L ▁L ambda , ▁but ▁stroke ▁was ▁reduced ▁to ▁a ▁more ▁conventional ▁. ▁Total ▁disp lacement ▁was ▁, ▁with ▁ ▁produced ▁at ▁ 4 0 0 0   r pm . ▁ ▁August a ▁An ▁all - new ▁V 4 ▁was ▁designed ▁for