dickball

of a STOCK (US) 2001 a4 1.8tqm with the speed limiter off?

Skene @ PES Tuning

147.... give or take

Just Dave (my car is ugly)

It's between 141 and 147.

RageRacer

Make sure your tires can handle the increased speed before you do a high speed run!

HedonismBot

but if you find the need to drive faster then 140 MPH you've got bigger problems

JJA42000

Ive gone 145 in my 2000 and was very near redline

eMKay (BFLO)

Well, I bet you can make a solid fuel rocket from standard materials 8-}

Deerslayer

At lower speeds, torque is more important than HP. When speeds increase to the point that wind drag is significant, more HP will result in a higher top speed.

Stang Guy

You could have 1000hp on tap, but if you're running a 4.11:1 final gear ratio (like what you'd use in a street/drag racer) you'll be redlined at 80mph.

Deerslayer

Otherwise, you will reach a point where the force provided by the engine is equal to the wind drag and you can't go any faster. Reducing the drag or increasing the force provided by the engine (HP) will result in a higher speed.