Porsche 911 Carrera 4 (996, 3.4 litre) ~ 1998-2001
The four-wheel-drive system was what Porsche called âintelligentâ. It responded to the driving conditions and distributed power to the front and rear wheels as required, via a viscous coupling. During normal driving, only 5 percent of the power went to the front wheels, thus ensuring the car felt like a true rear-drive 911. However, if the system detected that a wheel was slipping then up to 40 percent of power would be transferred to the front, to give excellent traction and handling.
The Carrera 4 came as standard with PSM (Porsche Stability Management â which was optional on the standard Carrera). This electronic system combined traction control, anti-slip control (ASR) and Automatic Braking Differential (ABD) to enhance the carâs handling. Sensors measured direction, speed, yaw and lateral acceleration, and a computer used this information to determine the direction of travel. If the car over- or understeered, the system would apply the brakes to an individual wheel to get the car back on line. And if that wasnât sufficient, the engine speed would be altered to stabilise the car, as could the percentage of power transferred to the front wheels. PSM could be turned off if it wasnât required; for instance, for track use.
Whatâs more, the Carrera 4 was the first Porsche to feature E-Gas; effectively a âdrive-by-wireâ electronic throttle control instead of a traditional cable linkage between the accelerator pedal and the engine. It really was the most technologically advanced 911 to date.
Although the Carrera 4 was more expensive than the Carrera when new, as the cars came onto the secondhand market, the price differential reduced, making a Carrera 4 excellent value as a used car.
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