Appealing to the young, the old, and everyone in between, the Volkswagen Jetta’s upscale looks and versatile interior combine to create a just-right recipe for people looking for a comfortable, economical sedan. But this class-leading version is equipped with a turbodiesel engine, and is not sold in California or New England because it cannot pass emissions standards in those regions. That means you’ve gotta choose the next best sedan if you want to run on regular unleaded: the 2006 Toyota Corolla.