 It was re-engined again in October 1937 with a 900 hp (671 kW) Hispano-Suiza 12Ycrs-1 V12 engine with a 20mm cannon firing through the propeller boss.Despite reaching 400 km/h (248 mph), faster than any of the other competitors, the R.90 was not ordered into production, 20 Loire 210s being purchased instead.Although the attempts to sell the R.90 to the French Navy failed, the aircraft attracted the attention of the Spanish Republican Air Force, which placed an order for 24 of a landplane derivative, the Romano R.83.