a superchip will give you a 4bhp increase for £293.75
chipping a N/A petrol engine is fairly pointless unless you have a cam kit fitted, a full exhaust, decent induciton kit, and more money than sense. even with all that you'd still be very lucky to hit 100bhp. dont believe the usual chipping claims, only a tubo can see massive gains, especially a TD.
its always better to buy a faster car.