The Audi A4 is a small luxury sedan available in three maain trim levels premium and prestige. a more fuel efficient a4 ultra subtrim is aslo available in conjunction with the preminium and preminium plus trims . under the hood is a turbo charged 2.0- liter four cylinder engine(252 horsepower and 273 pound -feet of torque). The A4 ultras engine is less powerful( 190 hp and 236 lb - ft of torque) but gets better fuel economy. Like in many sedans in the clss the A4 has a bias sport over luxury . the seats and ride are on the firm side but they also encourage support and control respectievely . it also quieter than before with the engine emitting less of an uncouth growl as its predecessors and many rival engines