▁the ▁August a . ▁Produ ced ▁from ▁ 1 9 3 4 ▁through ▁ 1 9 3 8 , ▁the ▁August a ' s ▁engine ▁disp la ced ▁just ▁ ▁with ▁a ▁ ▁bore ▁and ▁stroke . ▁Power ▁output ▁was ▁ ▁at ▁ 4 0 0 0   r pm . ▁ ▁April ia ▁The ▁engine ▁was ▁red es igned ▁again ▁for ▁ 1 9 3 6 ' s ▁April ia . ▁The ▁first - series ▁cars ▁used ▁a ▁ ▁version ▁with ▁a ▁ ▁bore ▁and ▁stroke . ▁Output ▁was ▁ ▁at ▁ 4 3 0 0   r pm . ▁ ▁A ▁second ▁series ▁was ▁un ve iled ▁for ▁ 1 9 3 9 ▁with ▁an ▁en larg ed ▁ ▁engine . ▁It ▁did ▁not ▁share ▁its ▁prede cess or ' s ▁dimensions , ▁with ▁bore ▁and ▁stroke ▁now ▁at ▁. ▁Power ▁output ▁was ▁nearly ▁the ▁same ▁at ▁. ▁ ▁Ar de a ▁ ▁A ▁small ▁V 4 ▁( tip o ▁ 1 0 0 ) ▁power ed ▁the ▁compact ▁ 1 9 3 9 ▁Ar de a . ▁It ▁was ▁a ▁ 2 0 ° ▁narrow - angle ▁engine ▁disp la cing ▁just ▁. ▁B ore ▁and ▁stroke ▁were ▁new ▁again ▁at ▁, ▁and ▁output ▁was ▁just ▁ ▁at ▁ 4 6 0 0   r pm . ▁For ▁the ▁ 1 9 4 9 ▁tipo ▁ 1 0 0 B ▁power ▁was ▁increased ▁to ▁. ▁ ▁App ia ▁ ▁The ▁V 4 ▁returned ▁after ▁the ▁war ▁with ▁the ▁ 1