The 1999 Lincoln Navigator is available as a 4-door, 7-seat sport utility. Starting at $40,755, the 1999 Lincoln Navigator 4x2 is powered by a 5.4L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 13-mpg in the city and 17-mpg on the highway. The top of the line 1999LincolnNavigator4x4 , priced at $ 44,405 , is powered by a 5.4L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 12-mpg in the city and 16-mpg on the highway.