The Romanian IAR-80/81 fighter never had the chance to take on mid or late-war Allied fighters with anything like even odds...
Because the stupid Luftwaffe commanders refused to supply the IAR factory with BMW-801 engines or provide some of the necessary tools for licence production , this Romanian -built fighter had to finish the war with virtually the same engine it started : IAR K14 ( 1040 horsepower at best ), a locally produced version of the French Gnome-Rhone 14M radial engine ...
Had the IAR-80/81's beend refitted with the BMW-801 they might have stood a fighting chance against the Russian La-5, or the American P-38's and P-51's it faced in 1944...