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2018 Jeep Grand Cherokee Trackhawk: The 707-HP SUV

Helping this SUV move out in a hurry is a Torque Reserve launch-control feature that briefly holds the supercharger bypass valve closed while cutting spark and fuel to specific cylinders to limit torque before the brake is released. The supercharged 6.2-liter Hemi V-8 is mostly left alone otherwise, right down to its forged pistons, sodium-filled exhaust valves, heavy-duty bearings, and blower pushing as much as 11.6 psi. To keep the Hellcat from lunching the Trackhawk’s driveline, Jeep fortifies the eight-speed automatic transmission, fits forged chain sprockets and a wider chain in the transfer case.

2018 Jeep Grand Cherokee Trackhawk: The 707-HP SUV