If you are looking for a sleeper that can take on most sports cars, then look no further than the 2013 version Jeep Grand Cherokee SRT HPE650. Mildly tuned by Hennessey Performance, this beast of an SUV can reach 60mph in 3.9 seconds and finish the quarter-mile in 12.6 seconds–not a shabby attempt at all. Turn up the volume on the video below and listen to the 650 horsepower, supercharged 6.4-liter Hemi engine roar down the drag strip. Each of the cylinder heads was ported for higher capacity and mated to high-flow headers that improve airflow.