the 4wd WRX i looked at on parkers came up with 242g/km

http://www.parkers.co.uk/cars/road-tax/?deriv=20141

but the one they list as AWD is 219g/km?

i just did a vehicle enquiry on my mates number plate on his subaru WRX, (on the DVLA site) and his has come up as 242g/km

so theres your answer, WRX's as of 2009 will be £415, and as of 2010 they will be £430