Taking a Dodge Magnum—a car never known for outright speed—and stuffing it with an 800-horsepower Hellcat Redeye engine is a ...

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With its 5.7-liter V-8, the R/T is rated at 14/22/17 mpg, while the supercharged Hellcat swills a gallon of premium every 12 miles in the city, 17 miles on the highway and 13 combined. Dodge has ...