Charade GTti was never called detomaso
Detomaso only came in G11 model (1984-87) with 1.0 turbo.
Detomaso was discontinued for G100 series. and only GTTis and GTXx were made.
Later G200 was redisigned as detomaso and yes that model had 1.6 litre turbo engine. But this model has to be imported, not available presently in pak.
if you want your hand on the wheel of a turbo charade, look for a G11 or GTti, a few are also available for sale on this forum
Goodluck