I am going to throw something a bit left field in here...........Saab turbo x......very clever 4wd system able to put 100% drive to the rear with a electric lsd that can vector power side to side at the rear, a 2.8 v6 turbo engine ( holden) that is 280bhp standard and easy as peas to tune , there are 400bhp ones out there, 320 bhp is a simple map and they can be had for 6-8k