The Athlete in the Sports Utility Segment
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Cayenne SCreating the Cayenne S, Porsche has developed a truly unique sports utility vehicle (SUV) proudly presenting its heritage in terms of performance, dynamic driving characteristics, safety, and looks.
From the side, in turn, the two models look very similar indeed, only the special design of the wheels and the brake callipers finished in silver marking the difference between the two models. V8 Normal-Aspiration Power Unit Displacing 4.5 Litres The V8 normal-aspiration power unit in the Cayenne S develops maximum output of 250 kW (340 bhp) at 6000 rpm from a capacity of 4.5 litres. Featuring 32 valves and integral dry sump lubrication, this 8-cylinder sparkignition power unit comes with two rows of cylinders opposed at an angle of 90° as well as infinitely adjustable intake camshafts. The engine itself is able to operate smoothly even at an angle of 45°, simply ideal for off-road requirements. Applying the good experience gained with the engine of the Boxster through its particular cylinder geometry, Porsche's engineers have chosen specific dimensions also for the V8: The crankshaft, for example, runs with stroke of 83 millimetres or 3.27", which, in combination with the cylinder bore of 93 millimetres or 3.66" carried over from the Boxster S, provides engine displacement of exactly 4511 cc. The Cayenne S features cast aluminum pistons providing a compression ratio of 11.5:1. The cylinder head follows the two-piece concept already applied on the 911 Turbo, the separate crankcase with cup tappets and crankshaft bearings allowing use of an aluminium/silicon alloy in the cylinder head able to withstand high temperatures. The gas charge cycle is controlled by four valves per cylinder operated directly via cup tappets with hydraulic valve play compensation. The two intake and two outlet valves per cylinder are in V arrangement. Like in Porsche's other models, VarioCam technology serves here, too, to combine a high level of specific output with superior torque, VarioCam adjusting the camshafts in this case by an angle of 25°. The intake system featured in this V8 power unit also serves to ensure a "beefy" torque curve, applying the principle of oscillating tube charging and requiring a perfect match of the intake manifolds in length and diameter in conjunction with optimised intake duct geometry. The exhaust system on Porsche's new V8 features two exhaust ducts connected with one another downstream of the main catalysts by a so-called crossover point improving engine torque at low speeds. The catalysts are controlled by two oxygen sensors on each precatalyst providing information to the electronic engine control system in order to keep emissions within the limits allowed. This so-called "stereo" or dual-sensor control serves to minimise exhaust emissions, enabling both the Cayenne S and the Cayenne Turbo from the start to fulfil the EU4 standards appli-cable in Europe and the LEV standard required in the USA. The entire exhaust system is made of special stainless steel in the interest of a long running life. Top Speed 242 km/h or 150 mph The Cayenne S has everything it takes to stand out as one of the fastest and most dynamic sports utilities. Its particular fortes include outstanding power and performance, a dynamic surge of power with a very good engine response and, at the same time, all the features required for travelling in genuine style. Maximum torque of the V8 power unit is 420 Newtonmetres or 310 lb-ft maintained consistently between 2500 and 5500 rpm. This enables the Cayenne S with its six-speed manual gearbox fitted as standard to accelerate from 0 - 100 km/h in 6.8 seconds, acceleration to 100 km/h with Porsche's ultra-smooth Tiptronic S automatic transmission coming in 7.2 seconds. Top speed, finally, is 242 km/h or 150 mph. Active Safety Ensured by Innovative Four-Wheel Drive and PSM
The excellent performance of the Cayenne S on the road is supplemented ideally by equally outstanding performance offroad. When driven in light terrain, the Cayenne S is able to handle all requirements through its intelligent four-wheel drive without any modification of the traction systems. Whenever the going gets tough, on the other hand, Porsche Traction Management (PTM) is able to interact with the reduced-ratio offroad gear integrated in the power divider: As soon as the driver activates the low-range mode by means of a toggle switch on the centre console, this reduction gear in the power divider takes effect, PTM and PSM preparing various control systems such as ABS, ABD and differential control for offroad motoring. These "standard" offroad qualities offered by the Cayenne models can be enhanced when-ever required to an even higher level of perfection: Should the going become so tough that individual wheels lose ground contact altogether, the four-wheel drive system is linked by rigid, firm connections to keep the driver on the move. In that case all the driver has to do is flip the offroad switch a second time to obtain a 100 per cent front-to-rear wheel lock. Also featured as standard in the Cayenne, Porsche Stability Management (PSM) is constantly in touch with PTM, but only intervenes when the vehicle reaches its physical limits. Masterminding major systems such as ABS, ASR and the ABD automatic brake differential, PSM cuts in, for example, immediately when the Cayenne starts to over- or understeer, telling PTM to open the differential locks in order to enhance the vehicle's stability by applying the brakes specifically on individual wheels. And should the brake function not be sufficient to stabilise the Cayenne, PSM will intervene also in the engine management, controlling drive power by means of the ignition and throttle butterfly. PSM offers an additional function in the interest of even greater active safety, intervening specifically in the brakes whenever the trailer threatens to swerve out of control in order to restabilise the vehicle. Ideal Suspension with a Brake System Typical of Porsche All models in the Cayenne range boast a new axle concept combining supreme performance and dynamic driving characteristics with superior safety, driving comfort and offroad qualities. The front axle is an extra-large double-track control arm configuration resting on a subframe mounted elastically on extra-large rubber bearings and thus reducing drive noise to a mini-mum. Forces acting on the suspension are likewise kept to a minimum by the big distance between the two track control arms.The rear axle is an elaborate multiarm concept able to handle both traction forces and any kind of load with superior behaviour and driving qualities. The subframe resting on large hydraulically-dampened rubber mounts, in turn, ensures extra comfort and refinement on the road. Long spring travel, finally, makes offroad motoring more comfortable and refined, inward and rebound spring travel on the steel-spring suspension of the Cayenne S measuring 104 and 116 millimetres (4.09 and 4.57"), respectively, on the front axle, and 135/98 millimetres (4.57/3.86"), respectively, at the rear. With ground clearance of 217 millimetres or 8.54", the maximum embankment angle is 29.1° at the front and 25.7° at the rear. The ramp angle, in turn, is 20.4° and the Cayenne S is able to cross bodies of water up to 500 millimetres or 19.7" deep. Clearly, figures of this quality make the Cayenne S a genuine offroad specialist even in its "basic" trim. And as an option the Cayenne S is available with air suspension providing even greater ground clearance and, as a result, even better offroad driving qualities. Moving on to the brakes, the Cayenne S differs from the Cayenne Turbo only in its looks through the silver-coloured brake callipers on the top-of-the-range model. The elaborate brake system and the technical features of the brakes, therefore, are the same in both cases, the front axle coming with innervented, 350-millimetre (13.78") large brake discs featuring six-piston monobloc fixed callipers made of aluminium. At the rear brake discs measuring 330 millimetrs or 13.00" in diameter, plus four-piston monobloc fixed callipers, are quite sufficient to safely slow down even a fully loaded Cayenne towing a trailer. The standard tyres are again the same as on the Cayenne Turbo, with 18-inch ligh-alloy wheels all round running on 255/55 R 18 tyres. Larger wheels measuring 19 and even 20 inches are available as special equipment. Passive Safety of the Highest Standard Porsche's particular know-how in lightweight steel technology plays a significant role above all in the body of the car. Incorporating the most advanced and sophisticated materials, the Cayenne combines excellent passive safety with exceptionally good body stiffness. And featuring high-strength steel throughout 60 per cent of its body structure, the Cayenne ranks right at the top in the automotive industry in the use of such sophisticated, high-quality material. An unusual and particularly effective asset is the combination of various materials requiring special skills in joining technology. One innovation deserving particular mention in this context is the use of multiphase steel, that is dualphase and TRIP steel grades offering enhanced strength and good moulding qualities compared with conventional high-strength steel. The B-pillars at the inside and the reinforcements in the A- and B-pillars providing extra safety in a rollover, for example, are made of TRIP steel. Multi-phase steel offering supreme strength and rigidity is used at the bottom on the seat crossbars and on the rear floor cross-bars. Use of tailored blanks, tailor-made components already featured in Porsche's sports cars, ensures that all structures along the chassis legs and on the roof frame at the side are both light and extremely stable at the same time. The front section of the car features a combination of longitudinal support and crossbars ensuring intelligent distribution of forces in a collision: Three load levels on top of each other take up deformation energy, spread out forces into the stiff longitudinal floor support, the side-sill, tunnel and door shaft areas, and thus minimise any deformation of the interior. The highly resistant passenger cell, in turn, offers supreme passenger safety and protection. And last but not least, the shell structure of the sills is quite unusual, supplemented by a high-strength tube element inside the sills to reduce intrusion into the vehicle when hitting a pole from the side. In this case the thorax airbag integrated in the seat and the curtain airbag fitted in the roof frame and protecting occupants both front and rear ensure superior safety. In a head-on collision the fullsize airbags for the driver and front passenger are each activated by a two-stage gas generator reducing the forces acting on the occupants. Equipment and features - sophisticated and functional Inside, the Cayenne is functional and sophisticated in its wide range of features. Like on the six-cylinder Cayenne the wide range of standard features - to mention only a few examples - includes leather seats electrically adjustable at the front, an on-board computer, tinted heat-insulating glass, electric window lifts, an alarm system, and the steering column adjustable for both height and reach. The automatic air conditioning including an activated carbon filter with separate control for the driver and front passenger as well as a CD-radio with a double-tuner (MP3 compatible) and 12 loudspeakers all featured as standard ensure a pleasant atmosphere inside the car as well as supreme sound quality. Further comfort features are the electrical closing aid on the rear lid fitted as standard as well as the navigation module with DVD drive, providing larger memory capacity and allowing quicker access to navigation data. Porsche Communication Management (PCM) is available as an option with a TV tuner and an electronic trip recorder. And to see exactly what is happening behind him, the customer is also able to order his Cayenne with a backup camera as an individual option. The luggage compartment in the Cayenne S is the same as on the entry-level model, featuring a ski-bag, a partition net and a complete cover on top and offering capacity of 540 litres. The rear-seat backrests can be tilted to the front either with a 40:60 or 60:40 split or all the way from one side to the other, increasing luggage capacity in the process to a maximum of 1770 litres or 62 cubic feet.
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And a particular forte of the Cayenne
S, of course, is its superior qualities under all kinds of offroad driving
conditions. The Cayenne S stands out clearly as a true Porsche from the very
beginning. Like the Cayenne Turbo, the Cayenne S, almost identical in its
looks, is characterised by muscular wheel arches, the headlights so typical
of the marque, the V-shaped engine compartment lid, and the overall design
of the vehicle typical of Porsche in every respect. The side windows are
equally outstanding design features, their round and stretched lines expressing
a successful combination of elegance and sportiness. Again like the Cayenne
Turbo, the Cayenne S features side-sills finished in body colour as well
as special front and rear air dams. The most significant signs of distinction
setting the Cayenne S and the Cayenne Turbo apart from one another at very
first sight are the smaller air intake scoops at the front and two instead
of four tailpipes at the rear.
All three Cayennes come as standard with
Porsche Traction Management (PTM) significantly improving dynamic performance
and handling in every respect. In its basic mode, this four-wheel-drive system
transmits 62 per cent of the engine's power to the rear wheels and 38 per
cent to the front. A multiple-plate clutch operated by an electric motor
and controlled electronically is then able, depending on the driving situation
and the driver's requirements, to feed up to 100 per cent of the engine's
power either to the front or to the rear. The map-controlled front-to-rear
differential lock as well as the rear axle differential available as an option
respond not only to a lack of traction on the various wheels, but also interact
with sensors measuring the speed of the vehicle, lateral acceleration, the
steering angle and operation of the gas pedal. This allows PTM to calculate
the optimum degree of locking action, distributing drive forces accordingly
to the front and rear wheels. The results of this intelligent technology,
inter alia, are excellent driving stability, better steering control and
enhanced control of the entire vehicle when driving to the limit.