Jeep’s latest Grand Cherokee Trackhawk is a heck of a quick machine, a super-SUV, you might say.

The $135,000 machine’s 6.2-litre supercharged Hellcat motor cranks out some 522kW, or 707hp in the old money, and can sprint to 100km/h in a brain-numbing 3.5 seconds.

But crazy Texan tuner Hennessey decided to have a go at improving on that, and has produced one that develops 1000hp (750kW) and  cuts the run to 100km/h to just 2.7 seconds – lineball with things like a Lambo Aventador, McLaren 650S or a Ferrari F12.

A quarter mile sprint is demolished in just 10.7 seconds and the HPE1000 Trackhawk, as the Hennessey version is called, exits at 132 mph, or 211km/h.

The tuned engine actually puts out 1012 hp at 6500rpm, thanks mainly to a giant 4.5-litre supercharger with 14 psi of boost.

Other mods include stainless steel long tube headers and a high-flow supercharger bypass valve with high flow injectors.

The standard fuel system is upgraded with a Boost-a-pump system and custom tuning for the engine is done with an HPE engine management chip.

Buy one and you’ll also get lots of badging and interior plaques signed by John Hennessey. Another plaque, under the bonnet, is signed by the technician who built the engine.

outrageous jeep quick as lambo - HPE1000 engine - Outrageous Jeep quick as Lambo

However, you might not get quite the performance that the Hennessey blokes got on their dragstrip.

They make it clear that the quarter-mile time was at the hands of an experienced driver on a perfectly prepared course and with the big Jeep wearing drag radial rear tyres.

You can see a video of the sprint on Hennessey’s home page.

Launch control is engaged and there’s a lovely bellow from the V8 a split-second before the brake is released and the Trackhawk takes off – almost literally.

The nose can be seen lifting as the tail end hunkers down, but the vehicle tracks well and the quarter mile is done before you can say a big word, like ‘Hennessey.’

What the HPE1000 costs is not mentioned, but you can bet it won’t be in the bargain category.

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Outrageous Jeep quick as Lambo

Buys

Bill Buys, probably Australia’s longest-serving motoring writer, has been at his craft for more than five decades. Athough motoring has always been in his DNA, he was also night crime reporter, foreign page editor and later chief reporter of the famed Rand Daily Mail. He’s twice been shot at, attacked by a rhinoceros and had several chilling experiences in aircraft. His experience includes stints in traffic law enforcement, motor racing and rallying and writing for a variety of local and international publications. He has covered countless events, ranging from world motor shows and Formula 1 Grands Prix to Targa tarmac and round-the-houses meetings. A motoring tragic, he has owned more than 90 cars. Somewhat of a nostalgic, he has a special interest in classic cars. He is the father of Targa star Robert Buys, who often adds his expertise to Bill’s reviews.

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