You'll need to lose about 6-10 inches of length and about 500+ lbs and you'll have a good start.
These cars are not great handlers... parts can be purchased to make it a better handler, but it will not compete with a car that is purpose built and in a smaller class overall. Or at least not in a cost effective manner.
Agreed with the posts above. One can't overcome mass. I tired pacing my friend who has a WRX last weekend. I never felt concerned during the twisties by his car flew effortlessly through the turns where I really had to handle mine and be careful when coming out.
Although he said he could hear me coming out of the turns every time. And seeing me come out a bit sideways was worth the price of admission to.