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Autoweek in review: What you may have missed

A lot was going on at One Autoweek Tower during February's first week. Besides the Chicago Auto Show we talked Super Bowl commercials, Formula One testing and even reviewed a supercar. Here are some of the biggest stories from the week.

McLaren MP4-12 650S hits the Web ahead of official Geneva reveal

Images of the new McLaren MP4-12 650S have leaked to the Internet ahead of a planned unveiling for the British supercar at the Geneva Motor Show in early March. Created in response to customer demand for an edgier version of the McLaren MP4-12C offering greater levels of driver engagement, the 650S runs a more heavily tuned version of McLaren's twin-turbocharged 3.8-liter V8 direct-injection engine producing a claimed 25 hp more than the variant used by standard sibling for a total of 641 hp (as its name suggests 650 ps -- metric hp). Further details remain scarce ahead of the MP4-12C 650S's official public unveiling in Switzerland two weeks from now, although information passed on to prospective customers at a private presentation of the new two-seater held last week suggest it is also in line to receive a series of modifications to its seven-speed dual clutch gearbox, suspension, steering, brakes and aerodynamics -- all aimed at providing it with a more aggressive nature and added racetrack ability.

Porsche 911 GT3 RS 4.0 arrives

Porsche 911 GT3 RS 4.0 - less weight, more power Yes, we have more than enough on the Porsche 911 GT3 RS 4.0 to know it’s for real, but Porsche hasn’t yet chosen to make it all official. But it probably will later today. The 911 GT3 RS 4.0 has been rumoured for a while as the last swansong for the current generation of 911s, and the ultimate road-going GT3 RS to boot.