Like any true supercar, McLaren's 650S isn't best measured against its straight-line acceleration yardsticks--but that's not to say it isn't blisteringly quick. Today, McLaren revealed the performance specs for its Goldilocks model ahead of its debut at the 2014 Geneva Motor Show next week.

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Built to slot between the P1 hypercar and the 12C supercar, the 650S defies the possibility of any naming convention while perfectly hitting its marks.

The nitty gritty: the 650S rockets off the line to 62 mph in just 3.0 seconds, meaning it should hit 60 mph for us Yanks in about 2.9; 0-124 mph comes in just 8.4 seconds; and it rattles off the quarter mile in 10.5 seconds at 139 mph. Top speed? 207 mph. Braking? 62 mph-zero in 100 feet, 124 mph-zero in 404 feet, and 186 mph-zero in 889 feet.

McLaren's newest supercar owes its brisk performance to its potent 641-horsepower twin-turbo V-8 engine and sophisticated power delivery system. The 650S's relatively light weight of 2,932 pounds dry, which yields a power-to-weight factor of 437 horsepower per ton (or 4.57 pounds per horsepower) also helps.

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Despite its exceedingly fleet-footed nature, on the EU combined cycle, the McLaren 650S scores 24.2 mpg--a figure that will likely translate into the low-20-mpg range for EPA use.

Full details, including live photos and more, will come next week during the 2014 Geneva Motor Show.

McLaren 650S

McLaren 650S