ed ▁with ▁a ▁ 2 2 0   hp ▁( 1 6 0   k W ) ▁T win ▁Cad illa c ▁Model ▁ 4 2 , ▁tw inned - V - 8 ▁engine ▁installation ▁( two ▁Model ▁ 4 2 ▁Cad illa c ▁autom obile ▁V - 8 s ▁driving ▁a ▁common ▁g ear box ). ▁It ▁could ▁achieve ▁a ▁speed ▁of ▁ 3 5   m ph ▁( 5 6 . 3   km / h ), ▁and ▁had ▁a ▁range ▁of ▁ 1 5 0   mi ▁( 2 4 1   km ). ▁The ▁vehicle ▁was ▁operated ▁with ▁a ▁crew ▁of ▁six . ▁ ▁Development ▁ ▁The ▁M 1 9 ▁evol ved ▁from ▁the ▁ 4 0   mm ▁Gun ▁Motor ▁Car riage ▁T 6 5 ▁project , ▁which ▁was ▁based ▁on ▁an ▁Arm ored ▁Force ▁requirement ▁for ▁a ▁light ▁anti - air craft ▁vehicle ▁based ▁on ▁the ▁M 5 ▁light ▁tank ▁ch ass is . ▁Although ▁tri als ▁were ▁successful ▁and ▁a ▁production ▁of ▁ 1 , 0 0 0 ▁T 6 5 s ▁had ▁been ▁requested , ▁the ▁project ▁was ▁stopped ▁by ▁the ▁Or dn ance ▁Department ▁since ▁the ▁M 5 A 1 ▁light ▁tank ▁ch ass is ▁was ▁being ▁ph ased ▁out ▁of ▁production . ▁ ▁Since ▁the ▁T 6 5 ▁project ▁was ▁f ading ▁away , ▁the ▁Arm ored ▁Force ▁still ▁needed ▁a ▁light ▁anti - air craft ▁vehicle , ▁so ▁they ▁made ▁a ▁new ▁project ▁( called ▁T 6 5 E 1 ) ▁based