The 2010 model of Audi's A4, one of their primary sedans, has ungone for the most part small changes for the 2010 model year, EXCEPT they are not ditching the 6 Cyl model, exclusively for thei 4cyl Turbo charged 2.0 motor.   This engine delivers nearly 250 HP and 0-60 times between 6.4 and 7.1 seconds.    The car will come standard with a rich offering, but if this performance is not enough, you can upgrade to the sportier S4, delivering 333 hp for around 46K.  Audi delivers this power with individual injection and spark delivered by individual Audi Ignition Coils,  while emissions are kept in check with the aid of Audi Air Pumps.