Danny,
If you compare the front of your car to an Escort, it's pretty obvious why this is . I could have fitted a WRC bumper and that would then see similar temps to you, but it would also create a lot of drag at high speed (due to the big frontal area/lack of exit area), and I would definitely have had to do the mods that Doug mentions, as so much more air would be going in to the engine bay.

How is your rad connected, or is it a turbo-cooler one?