Will the suspension from an S4 fit an A4? What could be the differences? Will it lower my A4? Is it adjustable?

 

Search will answer it, but I will too since it's late and I'm bored. It'll bolt right in. It'll lower your car very slightly. I have only the S4 springs on my A4 non-sport struts, and it lowered the car about a finger-width. With the sport struts it will likely come down more (this is assuming you have a 2.8 - if you have a 1.8T you're going to sit very high - your front end is nowhere near as heavy as an S4's front end). The S4 springs are meant for a heavier front end so the front will sit higher than the rear. The springs (again, all I can vouch for) give a GREAT road feel - firm but not punishing, great turn-in and response, exactly what the car should feel like. It is not adjustable. And the S4 sway bars will bolt up as well, and make a nice difference.

 

yes s4 suspension will fit the a4 but only the V6, the s4 suspension was made for a heavy v6, the 1.8t would kinda end up raised a bit in the front, i have S4 suspension and its a bit stiffer but dosent really lower my car or anything.

 

ONLY if its quattro. IIRC you had a FWD didnt you?