The most powerful truck in the world powered by Top Gear: the Mammoth 1000

yellow Hennessey Mammoth 1000 quarter front

The Ram 1500 TRX is undeniably a very capable pickup truck.

For now, the TRX’s more dynamic rival is a RAM alter ego from Hennessey Performance – the Mammoth 1000.

Top Gear’s Ollie Kew on their own YouTube channel drove a Mammoth 1000 on the roads of England and delivered a pretty honest review of the most powerful road-legal truck in the world.

More power: from a RAM TRX to a mammoth 1000

Interestingly, the Hennessey Mammoth 1000 represents a massive upgrade over the Ram 1500 TRX, not only in terms of power, but also in terms of size and capabilities.

A stock TRX with a supercharged 6.2-liter high-power Hellcat V8 engine delivers 702 horsepower of maximum power and 650 lb-ft of peak torque – this is huge compared to most pickup trucks on the market, but pales in comparison with the Mammoth 1000.

RELATED: Here’s How the Hennessey Mammoth 1000 TRX Is the World’s Fastest, Most Powerful Pickup

Thanks to several upgrades involving the supercharger system, filtration and fuel injection, the Hellcat engine on the Mammoth 1000s can now deliver 1,012 horsepower of maximum power and 969 lb-ft of peak torque, or about 310 hp and 319 lb-ft of torque more than a standard TRX.

The boost in power is pretty obvious as Ollie tried to unleash the Mammoth 1000 from 0-60 mph; the truck even made a wheelie due to the high power build-up on the wheels.

Mammoth 1000: a powerful truck that is hungry for fuel

However, such a power-guzzling truck monster has its drawbacks — one of which is the fact that achieving such high power means the upgraded engine will require more fuel to burn.

A stock Ram 1500 TRX already averages about 11 miles per gallon of fuel, a Mammoth 1000 should use more fuel than the base truck.

RELATED: See Hennessey’s Mammoth 1000 Ram TRX Record Target Power Numbers Dyno Testing

Before riding, Ollie added about 25 gallons of fuel to the Mammoth 1500’s tank.

Like the TRX, the Mammoth 1000 comes with a 33-gallon tank.

After filling up the tank, Ollie glanced at the gauge to see how far a fully filled Mammoth 1000 could travel, the indicator reads about 225 miles, and this means the Mammoth 1000 barely returns 7 MPG.

It’s a good thing the truck monster comes with a big fuel tank.

Mammoth 1000: out of place on the English roads

While everything is bigger in Texas, the same isn’t true in England – with its sheer size and looks, the Mammoth 1000 wouldn’t have an easy time navigating the country’s narrow roads.

In Ollie’s words, the Mammoth 1000 looks idiotic and out of place in England; yet we wouldn’t mind having the keys to it anyway.

Source: Top Gear, Hennessey Performance