The 2012 Hyundai Equus is available as a 4-door, 5-seat sedan. Starting at $59,000, the 2012 Hyundai Equus Signature is powered by a 5.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway. The top of the line 2012HyundaiEquusUltimate , priced at $ 66,000 , is powered by a 5.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway.