The most noticeable change to the 2011 Mazda CX-7 is a new, efficient 161-horsepower, 2.5-liter inline-four. Trims starting with “i” get the 2.5-liter engine, while “s” trims get the more powerful turbocharged 2.3-liter engine. The Mazda CX-7 competes with the Nissan Murano, Ford Edge, and Toyota Highlander.The new “i” Touring trim features a power adjustable driver’s seat, heated front seats,