Atlanta, Georgia – Porsche has announced new engines, all-wheel drive systems, transmissions, interior features and exterior design cues that will mark the evolutionary advances of the new 2009 Porsche 911 Carrera 4 and Carrera 4S models, which will join the already-announced two-wheel drive 911 Carrera and Carrera S models. The changes will result in enhanced performance, better fuel economy and reduced emissions.

The 3.6-litre engine in the Carrera 4 increases by 20 horsepower to 345 hp, while the 3.8-litre in the 4S increases by 30 horsepower to 385 hp.

The new generation of the Carrera 4 and 4S replaces the former all-wheel drive viscous multiple-plate clutch system with a more dynamic electronically-controlled Porsche Traction Management (PTM) system. Originally developed for the Porsche 911 Turbo and adapted for the normally-aspirated variants, the system combines a high level of driving stability with traction and agility, and a now-standard mechanical locking rear axle differential. The standard six-speed manual transmission can be optioned to a new seven-speed double-clutch automatic transmission which replaces the Tiptronic S unit.

Other changes include bi-Xenon headlamps, new LED driving lights and taillamps, optional dynamic bending lights, a wider rear stance, and a new Porsche Communication Management system that features a touch-screen and optional hard-disc-drive navigation system, XM Satellite Radio, Bluetooth connectivity, iPod port, USB port and auxiliary jack.

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