hi man sorry i haven't decided to comment your work any further but if you want some good hints and tips on this model check out the other R8 threads that are going on atm, seems like this is a vey popular car right now
anyway if you want me to help you, i can point out some inaccuracies (which you have a lot of but all can be fixed!)
first of you need to study many reference images to get a great result in the end.
i will comment on the side of your car first now as it hast the most flaws atm

some refining and some seams are needed then you are ok.
red - pretty wobbly get it straight
yellow - these areas need more attention they are either wrong or need better chamfering
blue - this seam runs in one straight line from the headlights to the door!
light blue - you missed a seam

green - be carefull to get the wheel arches nicely round, same goes for the front end
purple - again a bit wobbly
there are quite a lot more points that could be adressed now, but don't need any mentioning. i'm sure that you can fix the errors as i see how far you managed to get to now.
jabbasworld is an excellent base for reference picture of almost any car that has been built in the last years. have fun and enjoy