The 2014 Dodge SRT Viper is available as a 2-door, 2-seat coupe. Starting at $84,885, the 2014 Dodge SRT Viper Base is powered by a 8.4L , 10 -cylinder engine mated to a manual transmission that returns an EPA estimated 12-mpg in the city and 19-mpg on the highway. The top of the line 2014DodgeSRT ViperGTS , priced at $ 107,385 , is powered by a 8.4L , 10 - cylinder engine mated to a manual transmission that returns an EPA estimated 12-mpg in the city and 19-mpg on the highway.