I got the 170 2wd version and have no trouble putting the power down whilst running 205bhp and 320lbs ft torque. Power is controlled by your right foot. If i wanted too I could get the wheels spinning in 3rd and 4th depending on conditions i.e damp roads
i went 2wd as I wanted the extra boot space and better fuel economy. For my the majority driving the 'Quattro' system (its not permanent 4wd drive like the A4) is largely redundant so i didnt fancy lugging the extra weight around. If people want to argue about when it snows etc I fitted winter tyres to mine and NEVER got stuck once. A decent set of winter tyres is cheaper than maintaining the Quattro system IMO
go drive both versions and make your own mind up