I have been thinking of dropping my 07 a4 qtro. Now I'm really confused. What is the diffrence between a spring/shock setup and a coilovers setup? Which is better. Keeping in mind I dont have Audis sport suspension.

I've also heard that on a quattro there's a certain limiy you can drop. Is this true? If so how low?

 

Coilovers are height adjustible (and some also offer adjustments for damping). Also coils have proper matched springs and shocks whereas you could end up with a terrible ride if you dont have proper matched combo.

Best to do some more research ...