Swiss tuner O.CT has lifted the wraps off its uprated Jeep Grand Cherokee Trackhawk, handing the “most powerful production SUV ever built” even more grunt.

The Grand Cherokee Trackhawk’s (see local details here) standard 6,2-litre supercharged V8 has been injected with extra power and torque to ensure it provides drivers with “unmatched dynamic performance”.

Thanks to some clever remapping of the electronic control unit, the eight-cylinder, which originally produced 522 kW and 875 N.m, has been tuned to deliver a whopping 602 kW and 950 N.m to all four corners.

Performance figures for O.CT’s Jeep Grand Cherokee Trackhawk-based performance SUV have yet to be released. However, according to Jeep, a stock unit will complete the zero to 100 km/h sprint in a brisk 3,5 seconds. Top speed is a claimed 290 km/h.

O.CT says a Stage 2 upgrade is “coming soon”. Compared with Stage 1, the second performance kit will comprise further hardware and software upgrades, such as a supercharger pulley kit, upgraded gearbox software and a further-modified ECU. These additional modifications will squeeze an extra 34 kW and 50 N.m. from the V8 block, taking peak outputs to 636 kW and 1 000 N.m.