The 2018 Nissan Titan XD is available as a 2-door, 3-seat regular side. Starting at $42,740, the 2018 Nissan Titan XD S Diesel (A6) 4x2 Crew Cab HD is powered by a 5.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2018NissanTitan XDPRO-4X Gas (A7) 4x4 King Cab HD Gas , priced at $ 46,140 , is powered by a 5.6L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated