Turbo is a tough job due to a lack of space between the steering knuckle and exhaust manifold. Engine swap yeah could do the job but issues with tax and test etc? You could have her super charged for under 2 grand. Kits and chargers available via the uk. It's the gkd or gdk kit can never remember the name. Then buy a charger off a mini. You'll need a better diff though as i've read they eat small case ones. Best of luck.