Muscle cars are rarely pinnacles of lightweight construction, and the Dodge Challenger SRT8 392 is no exception. When equipped with a five-speed automatic transmission, the SRT8 392 weighs 4170 pounds. Opting for a six-speed manual transmission saves a negligible ten pounds but makes the SRT8 392 more engaging to drive. Fortunately the Challenger counters its mass with a 6.4-liter V-8 with 470 hp and 470 lb-ft of torque, which is enough to send the big coupe to 60 mph in less than five seconds. The size of the Hemi V-8 engine contributes plenty of pounds to the curb weight, but the Challenger isn’t a light car to begin with. Its big footprint — nearly as long and as wide as the Dodge Grand Caravan minivan — means that even the lightest versions are still heavy hitters. The Challenger SXT, which has a 3.6-liter V-6 engine with 305 hp, weighs 3834 pounds. The Challenger R/T is the middle child, with a 375-hp 5.7-liter V-8 and curb weight of 4082 pounds.