McLaren has some official information on its new 650S Coupe and Spider models ahead of its first public outing at the Geneva Motor Show next month.

The 650S is a facelifted version of the 12C and with 25 percent different parts. Other cosmetic addons include the addition of "door blades" tweaked Active aerodynamics, bigger side vents for engine cooling and new alloy wheels fitted with Pirelli P Zero Corsa performance tires.

McLaren states that, while the drag coefficient figure remains the same as on the 12C, the restyling helps increase downforce by 24 percent at 150mph (241 km/h).

"As always with McLaren, the new design is there for good engineering reasons,' says McLaren Automotive CEO Mike Flewitt. "The newly designed front bumper improves downforce and steering turn-in. The high speed handling balance is now even better. The LED lights use less power and last longer."

The 650S uses a modified version of the 12C's 3.80liter bi-turbocharged V8 that gains 25hp and 78Nm (58 lb-ft), bringing the total to 641hp (650PS) and 678Nm (500 lb-ft) paired to a faster and better-controlled seven-speed dual clutch gearbox driving the rear wheels.

Compared to the 12C, McLaren says the 0-62mph (100km/h) time has dropped by 0.1 seconds to 3.0 seconds, while 0-125mph (201km/h) has improved by 0.5 seconds to 8.4 seconds.