Alfa Romeo GTA participating in the late '67,'68,'69 Tour de Corse.

"During the mid to late '60s Alfa was very active in motorsport. Autodelta, the racing division of Alfa, developed a car for competition that closely resembled to the road going model. These cars were named GTA instead of GT, the 'A' standing for "Alleggerita", Italian for lightweight."

Source: http://www.alfabb.com/bb/forums/gta-1965-1975/74038-tour-de-corse-gtas.html

More Info on the GTA model: http://www.alfaworkshop.co.uk/alfa_giulia_gta_sa.shtml & http://en.wikipedia.org/wiki/Alfa_Romeo_GTA