all new all round makes a HUGE difference. Drilled/grooved/plain wont make much difference at all.
Yeah, I'm with Pete on this one.
I think the problems associated with grooved and or drilled discs make them more trouble than they're worth. I have experience of all combinations of the above (though not all on Polo's) and I'd never use any of them again.
I had Tarox grooved discs and pads on my Manta GTE. They were noisy, didn't offer any improvement over the standard discs in terms of stopping distances and were expensive to buy! Within months of fitting them, the grooves were blocked with pad dust and because of this the pedal fluttered when slowing from high speeds. Eventually the grooves almost wore off one side of the discs (heavy disc wear)
.
Then I had Black Diamond drilled vented discs on my MK2 Escort and these chomped through pads and eventually hairline cracks appeared between the holes!
The grooved ATE "Powerdiscs" or whatever they were called on my G40 weren't much cop either. More heavy wear on the disc faces and partially blocked grooves sealed it for me.
Good quality O.E spec or bigger (256mm on the Polo's) are the way to go.
