Manufactured by Industrias Motorizadas Onieva S.A. in Madrid (1)
Motorcycles, furgoneta and motocarro were built from 1952 until 1967. The majority of these were powered by Hispano-Villiers two-strokes, but they also built machines for the Civil Guard assembled using BMW R-27 components. The R-27 engines were also fitted to motocarro.
ROA built some 40,000 motorcycles over 17 years of production.
Models included Foxter motorcycles and Triciclo three-wheelers, both available with 125 and 200cc engines.
Rafael Onieva Ariza (ROA) built his first motorcycle as a student in 1950, and went on to become a property developer, a man of considerable wealth and reputedly a very good person.
In the 1960s, as Tempo Onieva, they began building Tempo vans under licence from the German company and this venture was also a success. In 1967 the firm was absorbed by Barreiros, a major supplier of components for the Tempo.
Sources: historiadelautomovilenmalaga.blogspot.com, wikipedia.es
Notes: 1. Period advertising gives the address "Calle Molina Lario, Málaga", but this may be that of a dealer.