The Elizalde Tigre IV, also known as the ENMA Tigre IV, is a Spanish four-cylinder inverted air-cooled engine designed and built by Elizalde SA shortly after the Spanish Civil War.
Approximately 30 ENMA Tigre IV engines remain airworthy in Britain (as of July 2009), all powering CASA 1.131 aircraft which are Spanish licensed-built versions of the Bücker Jungmann.
Approximately 30 Tigre G-IV B engines are under restoration by the company Air Res Aviation located in Poland. The engines will be mainly intended for Bu-131 Jungmann's airplanes restored by Air Res Aviation.
Data from: Janes