A few critical details have emerged on what could be the world's fastest production car — and we're not talking about the Bugatti Chiron.

Aston Martin is currently working with Red Bull to make the extreme machine, which is alternately called AM-RB 001 and "Project Nebula." Up until now, precious little has been revealed about the car apart from an abstract sketch (pictured above) and the fact that legendary F1 engineer Adrian Newey is involved. Red Bull, of course, loves doing extreme things and has a seemingly limitless font of cash from which to draw, so Nebula is not to be taken lightly — and it comes at a time when the outrageous Chiron is expected to reclaim the world's-fastest-car title when it goes for the record in the next year or two.

It could cost nearly $5 million

But now, we know a little bit more, thanks to a customer event at the Monaco Grand Prix and some comments from Aston CEO Andy Palmer. Autocar reports that the AM-RB 001 will be limited to just 99 units. That's a small run, even by hypercar standards (for comparison, Bugatti is going to make 500 Chirons). It won't be sold in all of Aston's markets, because getting the car approved for sale everywhere just isn't practical when you're talking about such a low volume. (Much of Europe and the Middle East are likely destinations, of course — but beyond that, it's anyone's guess.)

It's also reported that Nebula will have a hybrid drivetrain of some sort, though specifics haven't been revealed. The car — which is being designed for simplicity and a singular focus on speed — is expected to weigh just a little more than top-tier LMP1 race cars like those running at Le Mans this weekend. That doesn't leave much wiggle room for heavy battery packs.

But apart from the spectacle of the car and the engineering challenge that it faces, it doesn't really matter for most of us: Autocar says it'll cost somewhere between £2 and £3 million ($2.9 million and $4.3 million), which will make it one of the most expensive new cars ever made. Amazingly, you can still spend much more than that on vintage cars, if your pockets are deep enough.