What low powered car to buy 18 year old ?

Current i have a 2004 Red Vauxhall corsa 1.2L.I am looking for something newer and sportier but with low engine size for insurance reasonsBudget of maybe £4,000Thanks for any help!Edit: would be interested in doing the car up with exhausts and body kit etc via /r/cars http://ift.tt/2ss3NM6