Unlike some SUVs that wouldn't know sport if they drove right through it, the 2007 Acura RDX's mission is to emphasize driving pleasure over outright utility. The 101.4 cubic feet of EPA passenger volume and 28.8 cubic feet of cargo space are adequate for a light-packing family of four (five in a pinch), but one trip down your favorite back road and you'll know why most buyers wind up choosing this Acura.