Last year the Volkswagen Passat had one major flaw that took away from the fact that it is a roomy, well designed, high quality family sedan on every other count. Its entry level engine, a wheezy (no, we don’t mean Mrs. Jefferson) 2.5 liter 5-cylinder, did little but spur any buyer with the means to do so to opt instead for the superior 2.0 liter TDI turbodiesel motor. [...]