I don't give a flying **** about back seats, or some Wikipedia retard's definition of "sports car". Mustangs are sports cars; Mustangs accelerate, AND brake, AND corner, AND aren't 4200lb pigs like Challengers.
Challengers are muscle cars. They're huge, and all they can do is go in a straight line. Mustangs are sports cars, they can do everything. Why Mustang owners are wetting their panties about the Challenger is beyond me. They're not the same type of vehicles at all.
Here's the other thing: road racing is exceptionally expensive. Most guys cant afford to do it, so they resort to the drag strip. As such, in the U.S., 1/4 mile will always be king as the performance metric which sells Big 3's cars.
Sure, personally, I would never pay $40K for a 485hp Challenger when i could get a 420 hp Mustang GT for $30K (today) or $40K with IRS and better chasis (in a few months).
But 700 hp for a factory street car is nothing to sneeze at. The Hellcat will have long coat tails - meaning it will sell a **** ton of down market Challengers and even Chargers. Its a flagship car.
2011 Mustang GT M6 3.31s
Matt HONEYCUTT Tune, Lethal Off-Road X, GT500 axlebacks, J&M LCAs, UPR UCA, Whiteline LCA relocation brackets, Eibach Pro-Kit Springs, Koni STR.T shocks/struts, GT500 strut mounts, SR Strut Tower Brace
Best 1/4 E/T (05/18/14 MIR - no tune, X-pipe, or UCA): 12.920 @ 109.40 mph (2.059 60ft)