The standard 33k base price 2015 Mustang GT is not made to compete against the 47k base price 2015 SRT 392, that will be the job of the GT350/GT500 variant ...
Most recent real world 1/4 mile testing ...
"Hellcat to 60 mph in 3.6 seconds—0.1 behind the GT500
—and through the quarter-mile in 11.7 at 126 mph—0.1-second ahead and 1-mph faster than the GT500. Dodge quotes an 11.2-second quarter-mile on the tacky surface of an NHRA-certified drag strip
, but the Pirellis feel so overstressed that hitting that low ET would also require dropping tire pressures to about 10 psi
. (We always conduct our acceleration tests at the manufacturer’s recommended tire pressures
.)" 2015 Dodge Challenger SRT Hellcat Test – Review – Car and Driver