- Porsche 911 Carrera 4S Coupe, 2013
Porsche is doubling its range of driving fun in the new 911 generation by launching the all-wheel drive Porsche 911 Carrera 4 on the market in four model versions. The new sports cars with their uniquely powerful proportions combine the excellent traction and driving stability of the active Porsche Traction Management (PTM) system with the benefits of lightweight design, new engines and additional assistance systems - traction and dynamics to the fourth power.
Despite enhanced engine and driving performance, all four models consume significantly less fuel than their respective previous models; in some cases the savings add up to as much as 16 per cent. So, the new all-wheel drive 911 is consistently following the same course as the 911 Carrera Type 991 presented in 2011. The Carrera 4 takes top efficiency and performance to an even higher level.
The most distinctive identifying feature of the 911 with all-wheel drive is still the wide rear section: compared to the two-wheel drive 911 Carrera models, the wheel housings at the rear are each 22 mm wider, and each of the rear tyres is 10 mm wider. This increases the track width of the 911 Carrera 4 by 42 mm, and the track width of the S-model by 36 mm. The impressive look at the rear is highlighted by an exclusive tail-light panel with parking light and rear light functions. The tail-light panel runs directly under the spoiler edge and visually joins the two rear lights. For one, this emphasises the powerful back end of the vehicle; for another, it lends the all-wheel drive models a unique and very distinctive night design. When the lights are turned on, the illuminated rear light band visually connects the rear lights and signals that a new all-wheel drive 911 is driving ahead.
Indicator shows torque distribution: all-wheel drive made visible
In the new 911 Carrera 4, this special driving fun is being made visible for the first time: as a new standard feature, an indicator can be called up on the instrument cluster display that shows how the PTM all-wheel drive is distributing engine power. A bar indicator with ten segments per axle continually informs the driver of the drive torque available at the main transmission output as well as its current distribution to the front and rear axle.
New: ACC with Porsche Active Safe helps avoid front-end collisions
Making its debut in the 911 model series is the optional adaptive cruise control system with Porsche Active Safe (PAS) that is now being offered in Porsche 911 Carrera 4 models with PDK. Porsche Active Safe (PAS) supports driver attentiveness and warns drivers when they approach a vehicle ahead too quickly - even if the adaptive cruise control is deactivated. The system thereby helps to prevent front-end collisions, e.g. due to driver misperception of the speed of the vehicle ahead.
Change of generation: previous models set technological milestones
The new all-wheel drive models are replacing a very successful previous generation that has sold a total of about 24,000 units. This represents a 34 per cent share of second generation 997 models. In 2008, this generation introduced one of the greatest advances in powertrain technology ever made in the 911 with all-wheel drive: the cars offered engines with petrol direct injection, the Porsche Doppelkupplungsgetriebe (PDK) and the electronically controlled Porsche Traction Management (PTM). In July 2011, Porsche crowned the model series with the 911 Carrera 4 GTS, whose 3.8-litre engine was performance enhanced to 408 hp (300 kW).
All-wheel drive
The new all-wheel drive 911 cars are equipped with the latest generation of Porsche Traction Management (PTM). It is based on the system of the 911 Turbo, Type 997 and was especially optimised in its control strategy with a special focus on improving efficiency and fuel economy.
As a result, PTM now supports the typical Porsche coasting function of the 911 equipped with PDK. If the vehicle is coasting without drive power, the PTM clutch is opened. This reduces the braking torque of the all-wheel drive system, which in turn improves fuel economy.
Engine and transmission
With the generation change, the all-wheel drive models of the 911 Carrera now have new engines with 3.4 litres and 3.8 litres of engine displacement.
To increase their efficiency, the boxer engines feature electrical system recuperation and map-controlled coolant thermal management. Other measures that improve fuel economy are friction minimising actions in engine design, reduced rolling resistance with new generation tyres and the introduction of electro-mechanical power steering.
The principle of only calling up engine power when it is actually needed has led to a new feature for sports cars in the new 911 cars with PDK: coasting. In this case, the term refers to coasting without any engine propulsion, which enables idling fuel consumption over specific segments of the driving route. In practical terms, this results in fuel savings of up to one litre per 100 km with an anticipatory style of driving in everyday operation.
Sound Symposer intensifies acoustic driving fun
The new generation Porsche 911 Carrera also offers the driver even sportier driving fun in its acoustics. The Sound Symposer - a standard feature in all models - produces an even more full-bodied and sporty engine sound in the interior and is operated by the standard Sport or optional Sport Plus control button.
Sport exhaust system boosts power and enjoyment
A sport exhaust system is also available as an option for the new all-wheel drive models. It not only dethrottles the exhaust at the press of a button, but also merges the two exhaust lines. Pressing the sport exhaust system button on the centre console gives the six-cylinder boxer engine a more full-bodied sound paired with optimal performance. The acoustical effect offers even more emotional appeal, especially since the sound symposer flap is simultaneously activated. The sport exhaust system is visually distinguished by two twin tailpipes with unique styling.
Transmissions: seven speeds for dynamics and efficiency
The Porsche strategy for realising efficient performance includes two transmissions that deliver uncompromising sportiness as well as long gear ratios that improve fuel economy: the world's first seven-speed manual gearbox in passenger car production and the Porsche Doppelkupplungsgetriebe (PDK), which also has seven gears. This means that drivers of the 911 Carrera with a manual gearbox can enjoy the same fuel economy advantages that the PDK is known to deliver: up to 19 per cent lower revs at the same vehicle speeds, which improves fuel economy by up to ten per cent in constant speed driving.
Chassis and control systems
In developing the new 911 Carrera generation, preparations were already made in tuning the chassis for the additional driving of the front wheels in the new all-wheel drive 911. That explains why the vehicle is largely based on the rear-wheel drive version. A significant exception is the wider track of the rear axle. Together with PTM all-wheel drive, this offers even higher stability in bends, even with powerful acceleration.
As in all 911 models, the longer wheelbase - lengthened by 100 mm compared to the previous model - provides for significantly better driving stability at high speeds. Other systems that guarantee top driving performance - some standard and some optional depending on the model - are the further advanced Porsche Active Suspension Management (PASM), dynamic engine mounts, Porsche Dynamic Chassis Control (PDCC), innovative electro-mechanical power steering, Porsche Torque Vectoring (PTV), a high-performance brake system and the car's wheels and tyres.
PASM sport chassis with downforce at the rear axle
The PASM sport chassis - which sports a ride height lowered by 20 mm and an aerodynamic package - is also offered in the new Porsche 911 Carrera 4 models. This aerodynamic tuning results in less lift at the front axle and even provides downforce at the rear axle. In sum, the lift is zero. As a result, a 911 Carrera 4 with PASM sport chassis delivers exceptionally good road contact at high speeds and reacts very spontaneously and directly to steering inputs.
Driving through a bend faster and safer: Porsche Torque Vectoring
Offering even further enhanced agility in the new 911 cars is Porsche Torque Vectoring (PTV), which is standard in the Porsche 911 Carrera 4S and is available as an option in the Porsche 911 Carrera 4. There are two versions of the system: PTV with mechanically locking differential for cars with a manual gearbox and PTV Plus with electronically controlled, fully variable differential lock for PDK vehicles. Essentially, when driving through a bend PTV/PTV Plus uses specific brake interventions at the inside rear wheel to improve agility and steering precision with a highly dynamic style of driving, and the differential lock improves the car's acceleration potential coming out of a bend.
Even sportier at the press of a button: from Sport button to Sport Chrono package
All 911 Carrera cars already have a Sport button as standard. It lets the driver choose tuning optimised for comfort and fuel economy or tuning that emphasises sporty performance. The optional Sport Chrono package with the additional Sport Plus button enables an even wider spread between sporty tuning and ride comfort in everyday driving. Besides configuring all relevant systems and functions for maximum performance, the Sport Chrono package also has controlled dynamic engine mounts.
New in the Sport Chrono package: downshifting with double declutching
The Sport Chrono package includes an analogue and digital chronometer; the optional PCM also has a performance indicator with memory function. Another new feature of the optional Sport Chrono package is that for vehicles with a manual gearbox it has been extended to automatically double declutch during downshifts in Sport Plus mode. In quick shifting, this better adapts engine speed to the lower gear, letting the driver utilise the engine's power or braking ability more effectively.
Porsche Dynamic Chassis Control for impressive performance gains
Making a decisive contribution towards impressive performance gains in the new 911 generation is Porsche Dynamic Chassis Control (PDCC) - an optional feature of the Porsche 911 Carrera 4S. With this system, the 911 attains a new level in terms of lateral acceleration and handling. Body roll of the vehicle is nearly fully compensated by the variable stabiliser system up to maximum lateral acceleration, e.g. when steering into a bend, driving through a bend or quickly changing lanes. Because of the reduced roll angles, the tyres are always optimally aligned to the road surface, so that they can transmit maximum force in any direction. This boosts potential vehicle speeds when driving through bends.