The 2017 Dodge Challenger is a 2-door, 5-seat Coupe, available in 5 trims, ranging from the R/T 392 to the SXT. Upon introduction, the $37,995 R/T 392 is equipped with a standard 6.4L, 8-cylinder, engine that achieves 14-mpg in the city and 23-mpg on the highway. a Manual transmission is standard. The $26,995 SXT is equipped with a standard 3.6L, 6-cylinder, engine that achieves 19-mpg in the city and 30-mpg on the highway. an Automatic transmission is standard.