Ok to answer the original question, you can greatly improve the driveability with the usual petrol tuning combination of exhaust, induction and remap. In that order. The 2.2 often runs about 175 bhp from factory, but you can get this up to 205 with the above mods. done right.
The trick is to get a reputable company to do a bespoke cat-back stainless steel exhaust for you that has sufficient silencing to avoid drone. Vortex in Grays Essex really did a good job on my 2.2, and more than that the Vortex Eco-Flo chamber really made a big difference, (particularly combined with freer flowing induction). They greatly improve the speed of the exhaust gasses, enabling greater air flow in to the engine. I just saw an episode of Wheeler Dealers where they put a pair of Vortex Race-Flos onto an AC Cobra. Plus of course putting a stainless system on will save you a lot of weight over the shocking factory system, which was very heavy. You should save around 15-20Kg.
I tried 5 different types of induction on my 2.2, and found it reacted best to a 76mm ID K&N cone filter instead of the air box. This was with the Vortex exhaust already fitted. Also saves a Kilo or two.
Finally a custom remap from Red Dot made a big difference, though it takes them time to do as the 2.2 is tricky to remap.
I put tuning threads in the tuning lounge about each mod a few years back, so have a look.
The figure of 205bhp may not seem stratospheric, but combined with the relatviely low weight of the 2.2 and the wide torque curve it actually makes for a pretty fast car. Of course red lining the 2.2 is huge fun and not something you can realy do with any of the other Brera engines (you can red line the 3.2 on a race track of course).
Brat Pack no.8