Avia was the brand name under which the commercial vehicles built by the Spanish Aeronáutica Industrial S. A. (AISA) company were marketed.
AISA had been primarily a maker of light aircraft, but in the late 50s turned with some success to light vans, trucks and buses manufacturing, using Perkins Hispania diesel engines.

One of the most interesting applications of Avia trucks was the Klöckner Humbolt Deutz

Deutz AG

Deutz AG is an engine manufacturer, based in Cologne, Germany.-History:The company was founded by Nikolaus Otto, inventor of the four-stroke internal combustion engine, in 1864 as N. A...

 Spanish subsidiary designed Avia-Deutz firefighting engine. Based on an Avia 3500L chassis-cab, it featured an air-cooled Deutz engine and Magirus

Magirus

Iveco Magirus AG is a truck manufacturer based in Ulm, Germany, founded by Conrad Dietrich Magirus . The company began manufacturing fire-fighting vehicles in 1864. In the late 1910s, it started the production of trucks and buses...

 firefighting equipment.

In the early 70s AISA was taken over by its main competitor Motor Iberica, manufacturer of the Ebro

Ebro trucks

Ebro trucks was a Spanish brand of light and medium trucks and buses, as well as all-wheel-drive utility vehicles and agricultural tractors, based mainly in Barcelona, Madrid, and Ávila....

 range of commercial vehicles, and gradually Avia vehicles became just badge engineered

Badge engineering

Badge engineering is an ironic term that describes the rebadging of one product as another...

 Ebros. When in the 80s Japanese Nissan Motors

Nissan Motors

, usually shortened to Nissan , is a multinational automaker headquartered in Japan. It was a core member of the Nissan Group, but has become more independent after its restructuring under Carlos Ghosn ....

 took over Motor Iberica, the Avia brand disappeared.

Spanish Avia should not be confused with the Czech Avia

Avia

Avia is a Czech aircraft and automotive company notable for producing biplane fighter aircraft, especially the B-534, and trucks.- History :...

aircraft and automotive brand of the very same trade mark.