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The 2004 Diamante is a 4-door, 5-passenger family sedan, available in 3 trims, ranging from the ES to the LS. The 2004 Diamante's closest competitors include the Chrysler 300M, the Ford Crown Victoria, and the Toyota Camry.
Upon introduction, both trims are equipped with a standard 3.5-liter, V6, 205-horsepower engine that achieves 18-mpg in the city and 25-mpg on the highway. A 4-speed automatic transmission with overdrive is standard.
The 2004 Diamante is freshened for 2004.