New car from Porsche is very powerful and fantastic. The 911 Carrera 4 has the same 345-horsepower flat-six engine as the regular Carrera, but has the added benefit of Porsche’s intelligent all-wheel drive system. All-new version AWD system was introduced. The system features electronic control of the differentials instead of the old viscous multi-plate clutch. It is a modified version of the system developed for the more powerful 911 Turbo, and features a mechanical limited-slip rear differential as standard equipment.
This system transfers at least five percent of torque to the front wheels at all times and, under low-grip conditions, can transfer up to 40 percent. So the 911 remains a nimble, predominantly rear-drive sports car but with the bonus traction of four driven wheels. In normal driving conditions, only the rear wheels are given power. However, in low-grip conditions, five to 40 percent of power can be seamlessly transferred to the front axle.
The driver may not even know it’s happening. The stability offers peace of mind as well as more confidence for spirited driving of this sporting machine. Porsche Stability Management with traction control comes standard and helps to reduce stopping distances. PSM works in conjunction with the Carrera 4′s variable differential.
The standard transmission is a close-ratio six-speed manual, with a PDK seven-speed automatic optional. The PDK has steering wheel-mounted controls for when the driver is in a shift it yourself mood. All C4 models can be distinguished from standard 911s thanks to wider rear fenders (by about 1.75 inches), a red reflector joining the rear LED brake lights, and LED daytime running lights up front as well as standard bi-xenon headlights.
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