Corsa – top of the line sport model for 1965–66. It was the only model available with the optional turbocharged flat-six. The base engine was the new four-carburetor "big valve" engine. Corsas had "full instrumentation", special emblems, and trim with a special "argent" silver painted rear cove area and pinstriping on the 1965 models. The optional 180 hp engine delivered an increase in power over the 1964 150 hp engine of the same displacement by slightly enlarging the carburetor, and increasing the size of the internal impeller and turbine blades.