Volvo continues to refine its segment-defining XC70 crossover. All-new two years ago, the XC70 is available in two models for 2010. The XC70 3.2 AWD offers a new PZEV (Partial Zero Emissions Vehicle rating) version of its naturally aspirated 3.2-liter 6-cylinder engine. Compared to the unchanged ULEV version, the PZEV produces slightly less horsepower (225 vs. 235), with the benefits of reduced em...