After fulfilling several government and licence contracts, the relatively young I.A.R. (Industria Aeronautică Română) company had enough resources and technical know-how to begin developing their own fighter aircraft. Taking inspiration from previous licenced projects, I.A.R. engineers initiated a private venture by beginning working on their own fighter aircraft in late 1937, which would later be known as the I.A.R. 80. As work was progressing slowly, the first prototype wasn’t completed until spring 1939. Initial testing produced positive results, proving that the I.A.R. 80 could be considered a modern fighter despite not matching the performance of contemporary Bf 109s and Spitfires. After addressing some minor issues and upgrading the prototype’s engine, the I.A.R. 80 was tested in a head-to-head competition with the German He 112. Impressed by the aircraft’s display, the Romanian government placed an order for 100 I.A.R. 80s to be produced, while only a limited number of He 112s were ordered for production. Despite starting production almost instantly after the order was placed, I.A.R. struggled to ramp up production as shortages on the Belgian-made FN Browning 7.92mm machine guns became an increasing issue in the wake of the German invasion of the Benelux states. By April 1941 however with Romania joining the Axis, the armament shortages were temporarily addressed. Taking advantage of the opportunity, I.A.R. upgraded their fighter to the I.A.R. 80-A, increasing the number of machine guns to the initially proposed six and installing a more powerful engine, thus solving many initial concerns with the aircraft.

Even prior to Romania’s entry into WW2 in 1941, the government was keen on modernizing their stock of strike aircraft and dive bombers. The latter role was to be filled with the Ju 87 Stuka. However, as Germany initially refused to permit a licence production, I.A.R. came up with the proposal to convert some I.A.R. 80 fighters into dive bombers, creating the I.A.R. 81. These machines differed only from fighter models in the installation of a bomb rack underneath the fuselage, capable of suspending a 225 kg bomb. The I.A.R. 81-C was the final modification of this series, featuring upgraded MG 151/20 20mm cannons compared to previous versions. Around 150 examples of this modification were produced out of the approximate total of around 350 I.A.R. 80/81. By the end of the war, most of the I.A.R. 81s were not used in the dive bomber role and were instead used side by side with the I.A.R. 80 as fighters, most notably taking part in the famous defense of Ploesti against U.S. bombing raids in 1944. I.A.R. 80s continued their service with the Romanian air force after the end of WW2 and even into the early 1950s, before being replaced by more advanced Soviet counterparts.