How Many Driven Wheels Do You Need?
by David Morgan (11 Jun 09)
Importing new torque transfer technology from the 473bhp Porsche 911 3.6 Turbo and dropping it into the less powerful 911 3.8 Carrera 4S has added driveline refinement. The new electro-magnetic coupling technology diverts all power and torque to the rear wheels when that's where traction needs to go. The previous Carrera 4S was always left with around 6% torque running through the front axle thanks to the older viscous couple refusing to give up all of its authority.
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