Wait for Fredoops (?) to chime in - he plays with euros quite abit and tuning on the cheap.
You do need to accept that the car will get louder but not faster with any mods ( due to abit of pork it has ).
Can I suggest mods to increase handling , and thus making the car "quicker" point to point and more enjoyable ?
New clutch / gearbox or even aftermarket LSD , plus an upgraded rear swaybar to start.