2018 Dodge Challenger SRT Demon br The car features a supercharged 6.2-liter Hemi Demon V8 engine that gets 840 horsepower and 770 pound-feet of torque. It is the fastest production car on the market today: It can hit 140mph in 9.6 seconds; 0-60mph in 2.3 seconds; 0-30mph in one second. That sprint is on the same level as the Bugatti Veyron, which has decidedly more cylinders to play with. The horsepower far outdoes the 600-plus range power of standard-issue Lamborghinis and Ferraris.