The 2002 Mitsubishi Diamante is available as a 4-door, 5-seat sedan. Starting at $26,997, the 2002 Mitsubishi Diamante VR-X is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway. The top of the line 2002MitsubishiDiamanteLS (A4) , priced at $ 28,447 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway.