The flagship Hyundai Genesis sedan gets freshened for 2012, with new lower front fascia and some trim pieces.? However, the big news is under the hood where the mid-size entry luxury sedan gets a new eight-speed automatic transmission and an all-new 5.0-liter, 429-hp V-8 engine.? The naturally aspired V-8 is rumored to get two percent better fuel economy along with better acceleration.