The sky's the limit when it comes to sports cars, the most exotic of which carry multi-million-dollar price tags and speedometers (appropriately) reaching beyond 300 miles per hour. And SUVs are getting up there too. But few are quite as extreme as the Ramsmobile RM-X2.

Billed as a "multipurpose hypercar," the Ramsmobile looks something along the lines of what we'd imagine (were we so inclined) the bastard child of a Hummer and, oh, say... a Lamborghini Reventon might look like. Which you'd think would work out more or less to an Urus or an LM002. But the RM-X2 appears in many ways even more extreme.

Just look at those giant, rear-hinged scissor doors that open not only to the front seats, but the rear seats as well – and all but ensure that you wouldn't be able to park it inside a garage with a ceiling any lower than Jay Leno's.

It's said to be built around a carbon monocoque (which would need to be larger than any we've seen), with Teflon-coated undercarriage (to keep mud from sticking) and a laser-sensor-enabled self-adjusting suspension offering a full foot of travel – almost as much as a Ford F-150 Raptor's, and more than just about anything else on or off the road.

Despite the slantback profile, Ramsmobile says the RM-X2 can accommodate between six and eight passengers (depending on the chosen configuration), and even an optional, deployable, electrically powered caterpillar track system to get out of particularly deep sand or snow.

And then there's the powertrain, sourced from GM: the buyer's choice of either a 6.2-liter supercharged LT5 V8 or a 6.6-liter Duramax diesel. There's even said to be an electric powertrain option on offer. Spec it just right and you can have as much as 999 horsepower, propelling the big beast to 62 in just 3.3 seconds.

Those are some lofty claims but the least believable of them all is the curb weight. Despite its gargantuan size, Ramsmobile says a lightweight version will weigh just 3,307 pounds. That's only a (small) human passenger's weight more than a McLaren 720S, another vehicle built around a carbon monocoque – albeit a much smaller one.

Notwithstanding the veracity of its claims, Ramsmobile says it will make a dozen units starting next year, at an undisclosed price that's sure to make all but the wealthiest oil barons wince.