Fernando Alonso in pre-race testing

Not a bad try - these aren't easy to get right.

Maybe you'd want to include a wheel (with a bit of tyre logo blur) in to the shot and use a slower shutter speed to convey a sense of movement - the shot as it is, looks a bit static.

Also, I think you've maybe overcompensated with the levels and curves in photoshop - the image seems flat and lacks contrast to me. Taking that filter off your lens might help some too.

Have attached an example of what can be achived - hope it helps.