Alfa Romeo 147 GTA 3.2 The 147 GTA, the last Alfa to be equipped with the famous V6 Busso, engine of anthology, as beautiful to contemplate as to hear, 3.2 liters, 250 hp, 5389 copies only.bodybuild aesthetics, lyrical rises in speed, true atmospheric engine as we see less and less with performances far from being ridiculous today.