The GT in Italian stands for Gran Turismo, which obviously has the same meaning.
Dirk, thanks for the 2-liter Turbo production numbers.
Some more infos about the 2-litre V8 production Ferrari:
To offer a cheaper model for the Italian market by avoiding the luxury tax for >2000cc cars, Ferrari, in 1975, developed a 2-litre version of the 308 GT4 3-litre V8. The displacement was reduced by the use of other cylinder liners and pistons with 66.8mm bore instead of 81mm, while the crankshaft was unchanged with 71mm stroke.
208 GT4 Dino, 1975-80, V8 16v carburated, 1991cc, 170hp, ~220kph.
208 GTB/GTS, 1980-82, V8 16v carburated, 1991cc, 155hp, ~213kph.
208 Turbo GTB/GTS, 1982-85, V8 16v Turbo, 1991cc, 220hp, ~242kph.
GTB/GTS Turbo, 1986-89, V8 16v Turbo intercooler, 1991cc, 254hp, ~253kph.