In all the excitement surrounding the SRT Demon, we almost overlooked the fact that Jeep slipped out the most-powerful production SUV at the same time. It involves the Hemi Hellcat engine, so we should probably take a closer look.

It must only be a matter of time before every product sold by Fiat Chrysler Automobiles in the USA comes fitted with the 707hp 6.2-litre supercharged engine. This is now the third model to be endowed with the monster Hemi, following the Challenger and Charger Hellcat models. We would include the SRT Demon too, but Dodge wants us to regard that particular ludicrous motor as unique. It has a Demon face cast into the block – so ok, we will.

The Grand Cherokee Trackhawk was hardly Detroit’s best kept secret, but that doesn’t stop it still being a little exciting. With 707hp, and 645lb-ft of torque, this is the most powerful production SUV to exist. This easily surpasses the already quite mental Dodge Durango SRT released earlier this year. Forget the Lamborghini LM002, the Bentley Bentayga W12, or even the BMW X5 Le Mans – the Trackhawk beats them all. The only way to get more power in an SUV would be to turn to aftermarket tuners.
Instead this craziness comes direct from the Jefferson North Assembly Plant in Detroit, and is responsible for the Trackhawk hitting 180mph, and doing 0-60mph in just 3.5 seconds. We repeat, 3.5 seconds. That’s quicker than a Ferrari F40, quicker than a Lexus LFA, and even quicker than...