Sentra 1.8, 4D Sedan, 1.8L I4 DOHC 16V, and 4-Speed Automatic with Overdrive. Real gas sipper! Fuel Efficient! If you want an amazing deal on an amazing car that will not break your pocket book, then take a look at this gas-saving 2006 Nissan Sentra. What a perfect match! This fantastic Sentra is available at the just right price for the just right person - You! J.D. Power and Associates gave the 2006 Sentra 4.5 out of 5 Power Circles for Overall Initial Quality Design.