It's not the most conventional of plug-in hybrids, of course. Unless we've missed something, Toyota's Prius Plug-In has no 903-horsepower version, nor does any Prius cost over a million dollars.
But then, you can't expect something too conventional from McLaren, world-famous race car team and producer of some of the world's most iconic supercars.
The new McLaren P1 is the company's latest offering, following the V-8 engined MP4-12C.
The P1 also features a V-8, displacing 3.8-liters, featuring twin turbochargers, and coupled to a 176-hp electric motor, all mid-mounted. Together they develop that 903-horsepower figure, allowing an electronically limited (!) top speed of 217 mph.
62 mph will disappear in under 3 seconds, 124 mph in under 7, and 186 mph in under 17 seconds.
But this is Green Car Reports. We answer the question "what'll she do, mister?" with a different set of numbers.
The first of these is the car's electric range, a modest 12 miles or so. It won't commute as far in EV mode as a Chevy Volt, but McLaren says it'd be enough electric range to make passage into some of Europe's increasingly emissions-restricted cities much easier. No doubt quieter for the city's residents, too...
There are no official mpg figures yet, but McLaren says the P1 will emit less than 200 g/km of CO2 on the combined European cycle. A little playing with the numbers (via this useful converter) and that translates to 32 mpg imperial (or more), or 26.6 mpg U.S.
Knock off the usual 15-20 percent discrepancy between European and EPA figures, and you're looking at 21-23 mpg.
Again then, it's no Prius Plug-In, but compared to other supercars it's positively saintly--a Ferrari FF does just 13 mpg. A Bugatti Veyron, only 10 mpg.
And emissions aside, we know which shape we'd rather have parked outside the house...
The production McLaren P1 supercar makes its world debut at next week's Geneva Motor Show.