And look at its competitors, even Volvo make a quicker hatch.
I think the Volvo C30 (which is the only hatch they make) is to be compared to the Bravo and not the GP, and i'll bet that the Bravo Abarth will a bigger engine (rumors says 1.8 TJET with 180-230hp).
The GP with the 1.4 TJET 120hp engine does 0-100 km/h in 8,9 sec. with a top speed of 195 km/h.
With the 150hp version of the 1.4 TJET, the GP should be a bit faster, perhaps close to 8 sec. (or lower) when doing 0-100 km/h.