While most of the automotive discussions online pertaining to the 2015 Dodge Challenger focus on the 707 horsepower models, it has been brought to my attention that some people aren’t clear on what the difference is between the different Hemi powered models so today, I bring you a detailed look at the 2015 Challenger in R/T, R/T Scat Pack, SRT 392 and SRT Hellcat form.