Hennessey Mammoth 1000 SUV: Seven-seat Ram 1500 TRX unveiled with 755kW

US muscle and supercar tuner Hennessey has unveiled the 2021 Hennessey Mammoth 1000 SUV, a seven-seat off-roader based on the dune-jumping Ram 1500 TRX performance pick-up.

Powering the Mammoth 1000 is the donor Ram 1500 TRX's 6.2-litre supercharged V8, retuned and reworked by Hennessey to develop 755kW (1012hp) and 1314Nm – significant increases over the 'standard' TRX ute's 523kW and 880Nm.

Extracting the additional kilowatts are a range of under-bonnet upgrades, including a larger 2.65-litre supercharger, unique engine tuning, upgraded supercharger pulleys, and high-flow catalytic converters, fuel injectors and air intake system.

Hennessey claims a 3.2-second sprint from zero to 60mph (97km/h), and an 11.4-second quarter-mile (402m) time (at 193km/h) – notable decreases over the showroom-specification TRX's 4.5-second 0-60mph time and 12.9-second quarter-mile claim (at 174km/h).

Key to the Mammoth 1000-specific upgrades is a full five-door SUV conversion, which sees the pick-up's roofline extended to cover the tray, with large windows letting light in on each side.

Above: The 'regular' Ram 1500 TRX pick-up.

A folding third row of seats fills the space previously used to haul loads, combining with a pair of 'captain's chairs' in the second row for a family-friendly total of seven seats.

Other exterior highlights include the fitment of a 'Mammoth Off-Road Package', which adds a 2.5-inch suspension lift (63.5mm), a unique hooped front bumper with an integrated LED light strip, a front suspension levelling kit, and 20-inch alloy wheels wrapped in 35-inch (889mm) off-road tyres.

Just 20 Hennessey Mammoth 1000 SUV vehicles will be built, each featuring a three-year/58,000-km warranty, and priced from US$375,000 (AU$483,000) before taxes and shipping – a sizeable increase over its pick-up donor's US$71,990 (AU$93,000) sticker.

While right-hand-drive converted versions of the Ram 1500 TRX pick-up will go on sale in Australia later in 2021, no Australian plans for the Mammoth 1000 SUV have been announced – though it's possible local Hennessey distributor KPM Motorsport could offer the package at a later date.

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