Scheduled for an update in 2008, Porsche's sleekly styled flagship 911 is available for 2007 in base Carrera, Carrera 4, Carrera 4S all-wheel-drive, GT3 and turbo forms. The all-wheel-drive system in the 4S model has a multi-disc viscous coupling and transfers between 5 and 40 percent of the engine's power permanently to the front wheels for very high grip levels on dry pavement as well as much-improved traction on slippery roads. Slightly wider at the rear than rear-drive 911s, the AWD versions are able to accommodate wider tires at the back for even more grip. Elsewhere in the line, the base 911 Carrera comes with a rear-mounted, 3.6-liter six-cylinder engine that generates 325 horsepower and 274 lb-ft of torque. Top speed is 177 mph, with 0-60 times just over five seconds. The Carrera S versions, meanwhile, take this performance up a notch with a 355-horsepower 3.8-liter flat six that cuts the car's 0-60 mph time to 4.6 seconds. Stability control is standard on the S and available on the base Carrera 4 models. An Active Suspension Management system is available that allows the driver to switch from what is already a sporty ride to ultra-grippy suspension settings with the flip of a switch. As if that's not enough, the 911 Turbo S comes with a turbocharged version of the 3.6-liter powerplant that provides 444 horsepower and 457 lb-ft of torque. Ceramic composite brakes, 18-inch alloy wheels, and high-performance tires are added to the Turbo S as well. Standard features include high-capacity four-wheel disc brakes with anti-lock control and Active Brake Differential, traction control, and front-side and side-curtain airbags. The options list is the longest in the industry, and affords almost total customization -- albeit at a stiff price.
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