The heart of the SRT8 392 is a 6.4-liter Hemi V8 with 470 horsepower and 470 lb-ft of torque. The latter figure is 90 lb-ft better than the Challenger's previous engine, adding a welcome kick in the pants to the straight line acceleration department. In fact, the SRT8 392 can scoot from a dead stop to 60 miles per hour in under five seconds.
If quarter mile races are more your thing, know that this coupe can run the quarter in mid 12's with the automatic transmission, or high 12's equipped with the row-it-yourself gearbox. New for the latest model is a launch-control system that spins the engine to optimal launch rpms, then manages wheelspin once underway for the quickest acceleration possible. Top speed is an impressive 182 in the manual and 175 with the automatic.
With all that power and displacement fuel economy is obviously not the primary concern of the vehicle's engineers, but it wasn't forgotten either. Both transmissions will return 14 city mpg, while the manual bests the automatic by one mpg for a highway rating of 23.
Speaking of transmissions, it should be known that the manual found in the 392 is no five-speed, but a six-speed TR-6060 Tremec unit with a dial-disc high performance clutch - the same one tested to the limits in the 2008 DodgeViper SR T10.
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