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New Porsche 911 Turbo improves fuel economy by 16%

3 May 2013

The new generation Porsche 911 Turbo and Turbo S, equipped with new advanced engines, PDK transmission, new combined thermal management system for the turbo engine and the transmission, the new Porsche Traction Management (PTM) all-wheel drive system, and other fuel efficiency technologies such as start/stop and active aerodynamics, have reduced NEDC fuel consumption by up to 16% to 9.7 l/100 km (24.3 mpg US); these figures apply to both models. Final US EPA label values will be calculated closer to the time the car is on sale in the United States.

The bi-turbocharged 3.8-liter flat 6-cylinder engine with direct gasoline injection produces 520 hp (383 kW) in the 911 Turbo and 560 hp (412 kW) in the S model. Porsche continues to be the only carmaker to offer two turbochargers with variable turbine geometry for a gasoline engine. Power is transferred to the drivetrain via the seven-speed dual clutch transmission (PDK), which now enables an auto start/stop function with engine shutoff that now activates earlier during coasting to a stop as well as a coasting function.

The 911 Turbo with the optional Sport Chrono Package accelerates from zero to 100 km/h in 3.2 seconds, which is even one-tenth better than the value of the previous 911 Turbo S. The new 911 Turbo S handles the standard sprint to 100 km/h in just 3.1 seconds. The car’s top speed is 318 km/h.

Porsche developed a new all-wheel drive system (PTM) with electronically controlled and activated multi-plate coupling. The system is equipped with a new water cooling function, so that it can direct even more drive torque to the front wheels if necessary.

The introduction of rear axle steering in all turbo models improves both circuit racing and everyday performance of the two new top sports cars. The system consists of two electro-mechanical actuators instead of the conventional control arms on the left and right of the rear axle. The steering angle of the rear wheels can be varied by up to 2.8 degrees, depending on vehicle speed.

At speeds up to 50 km/h (31 mph), when the front wheels are turned the system steers the rear wheels in the opposite direction. This actually corresponds to a virtual shortening of the wheelbase by 250 mm, which gives the 911 Turbo strong performance in curves. The system lets the car turn faster into the curve and offers more dynamic steering response. This also noticeably simplifies maneuvering and parking.

At speeds above 80 km/h (50 mph), the system steers the rear wheels parallel to the turned front wheels. This is equivalent to a virtual lengthening of the wheelbase by 500 mm and gives the sports car tremendous stability, especially at high speeds. At the same time, the steering input by the driver leads to significantly faster build-up of lateral force at the rear axle, which initiates the change in direction more spontaneous and harmoniously.

Porsche developed an active aerodynamic system on the new 911 Turbo models for the first time: Porsche active aerodynamics (PAA). It consists of a retractable three-stage front spoiler, the segments of which can be pneumatically extended, and a deployable rear wing with three adjustable wing positions. This makes it possible to tune the aerodynamics of the 911 Turbo to fulfill driver wishes for either optimal efficiency (speed position) or top dynamic performance.

In the performance position, all segments of the front spoiler are fully extended, and they generate considerable downforce at the front axle. Similarly, the rear wing is extended to its maximum height with the greatest angle of attack. This also generates more downforce at the rear axle. Dynamic performance is improved to such an extent that lap times at the North Loop of the Nürburgring are improved by up to two seconds due to this system alone.

The new top models of the 911 model series arrive on the market at the end of 2013 in the United States. The 911 Turbo is priced from $148,300 while the 911 Turbo S begins at $181,100, not including a destination charge of $950.

May 3, 2013 in Engines, Fuel Efficiency, Vehicle Systems | Permalink | Comments (0) | TrackBack (0)

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