If you’re wondering what a crossover is, think of it this way: it’s the shell of an SUV bolted onto the chassis of a car or, in some cases, a minivan. In the case of the 2007 Ford Edge, it’s all car underneath, thanks to its Ford Fusion/Mazda 6 architecture. Introduced at the 2006 Detroit Auto Show, the Edge takes those mechanicals and adds a stylish body and a robust powertrain to a fully independent suspension. The Edge promises to drive like a car, seat five comfortably and handle a multitude of cargo-hauling tasks, thanks to what Ford thinks is a flexible-use interior. Other similar crossovers include the Lincoln MKX (the luxury equivalent of the Edge) and the Mazda CX-7, though there will probably be enough differences between the Edge and the CX-7 to make them appeal to different buyers.