The RS4 is an almost complete departure from previous RS cars, as it was launched as a sedan, with an Avant and Convertible version arriving later. Its power comes from an FSI equipped, normally aspirated 4.2?L V8. This engine is very powerful, producing a total output of 414?hp. The engine also produces 317?ft?lbf of torque. Curb weight for the 2007 model is stated at 3,957 pounds.The 2007 RS 4 is a carryover from the 2006 model year.