The Fast Lane Car pits the 707-horsepower Dodge Challenger Hellcat Widebody against the equally 707-horsepower Jeep Grand Cherokee Trackhawk — same supercharged Hemi, two completely different missions. One’s a widened muscle coupe built purely to put power down; the other’s an SUV that can still tow a boat and run an eleven-second quarter mile. Watch to see which one actually wins the buyer’s dilemma.