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Porsche 911 Carrera 4S
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The design of the 7-speed manual gearbox in the 911 Carrera 4S is based in principle on the Porsche Doppelkupplung (PDK) 7-speed dual-clutch automatic. Gears 1 to 6 have a sports ratio and top speed is reached in 6th gear. The additional 7th gear has a long ratio, which reduces torque and helps to reduce fuel consumption. Lower engine revs at fast driving speeds also ensure a high level of comfort on long stretches of road.
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A selected-gear indicator in the tachometer reminds the driver of which gear is currently engaged, and an upshift indicator in the instrument cluster helps conserve fuel by suggesting upshift points optimized for fuel efficiency. Optionally available on the 911 Carrera 4S is the 7-speed dual-clutch automatic transmission, the Porsche PDK, featuring manual and automatic modes. It enables very fast gear changes with no interruption in the flow of power, while improving acceleration and fuel efficiency.
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