this car of 500 kg empty weight / 205 HP, thus 2.4 kg/HP, must be a good "racer" but just for the track, nothing for the road.

The "YES! Clubsport" (700 kg / 286 HP) has 2.5 kg/HP and is much better suited for the road.
http://www.yes-clubsport.de/
(chose the English menu)