Turbo lag is a problem with the Acura RDX. In traffic, the RDX is sluggish under partial throttle application, but if you dip in to extract added motive force the turbo can suddenly kick in and deliver more acceleration than expected. Not as satisfying as a V6 engine with similar power ratings, and at 14.8 mpg average, what's the point? This would be a much better vehicle with the Accord's V6 under the hood. Transmission shifts smoothly, however, and sport mode holds gears longer to keep motor in the thick of its power band. Paddle shifters help make the RDX a blast to drive on twisty roads.