With the 2015 Dodge Challenger set to hit showrooms this fall, we got an advanced look, as well as some behind the wheel time with each trim recently — including the base-model SXT, the R/T, the SRT 392 and the awesome 707 hp SRT Hellcat.

While testing the vehicles at the Portland International Raceway (in Oregon), we caught up Mark Trostle, Head of Design for SRT, Mopar and Motorsports, as well as Interior Design Manager Dan Zimmerman, who gave us the scoop on the updated Challenger.

While the car brand updates the 2015 vehicle in a number of ways, it doesn’t stray away from the retro look and feel that’s helped model’s sales grow each year since its introduction. This, in part, is due to its loyal following of enthusiasts who consistently offer feedback online and at regional events, which Dodge has been paying attention to, though fans might not realize.

For the 2015 Challenger, both the front and rear are modified to offer a sleeker and slimmer look, while adding in technology like LED headlamps to the headlamps and tail lamps. Each trim gets unique upgrades as well, like the 6.4-liter Scat Pack model, which is fitted with a new TorqueFlite eight-speed automatic transmission that provides an 11 percent fuel efficiency improvement.

The base SXT and SXT Plus models get a 3.6-liter Pentastar V-6 that generates 305 horsepower, while getting an EPA estimated 30 mpg on the highway, also an improvement of up to 11 percent. Those wanting more power, the legendary 5.7-liter HEMI V-8 is an option that punches out 375 horsepower with 410 lb.-ft. of torque, while a best-in-class 485-horsepower and best-in-class 475-lb.-ft. of torque is produced in the 6.4-liter HEMI V-8 Scat Pack that gets up to 25 mpg on the highway. And lastly, an all-new 707 horsepower SRT Hellcat delivers the most power in a muscle car ever.

The 2015 Challenger is also updated with a host of driver-centric upgrades to its all-new interior. Inside the car, we see premium cloth seating in Houndstooth or Torque, a stamped aluminum instrument panel bezel, 7-inch TFT (thin-film transistor) configurable cluster display, six-way power driver’s seat, a premium sound system, Keyless Enter ‘n Go with push-button start, leather-wrapped tilt-and-telescoping three-spoke steering wheel with vehicle controls, a leather-wrapped shift knob, and the list goes on.

The 2015 Dodge Challenger is due out this Fall, starting at just under $27,000 for the SXT and going up to over $59,000 for the SRT Hellcat.