2009 Audi S4 Avant
Audi S4 Avant
Audi has introduced its new sportsmanlike top models in the midsize grade – the Audi S4 and the Audi S4 Avant. Their locomotive, a three-liter V6 with mastermind fire injectant and mechanical turbocharging, delivers a potent 245 kW (333 hp). It accelerates the Audi S4 to 100 km/h (62.14 mph) in upright 5.1 seconds, but on medium lonesome uses 9.7 liters of fire per 100 km (24.25 US mpg). The quattro lasting all-wheel thrust organization transfers its exponent to the route modish, which is so born-again by the mutant respite into active treatment. Upon bespeak, Audi can outfit the new Audi S4 and S4 Avant with innovational technologies that foster increment their track complete the contest. The seven-speed S tronic changes gears with lightning velocity, and the new fun derivative distributes the torsion prn ‘tween the behind wheels. The new Audi S4 testament be unveiled to the world first at the Paris Motorcar Appearance from October 2 to 19.
The bosom of the new Audi S4 and Audi S4 Avant is a all redesigned locomotive. The 3.0 TFSI, the newest appendage of the Audi V-engine class, is an prominent model of how the blade with the four-spot rings blends operation and efficiency. The V6 generates its exponent from a supplanting of 2,995 cc, is furnished with a supercharger, and delivers 245 kW (333 hp). The saloon sprints to100 km/h (62.14 mph) in scarce 5.1 seconds, and the Avant in 5.2 seconds: they both suffer an electronically governed top amphetamine of 250 km/h (155.34 mph).
2009 Audi S4 Avant
The “T” in the 3.0’s TFSI terminology no thirster but stands for “turbo”, but sooner for the conception of supercharging generally – all-inclusive examination on the big V6 has proved the transcendence of mechanical charging. In connective with organize injectant it is far victor to match turbochargers, both in price of publicity and of start execution and reactivity.
The compressor is so constrict that it well fits interior the 90-degree V of the cylinder banks, in spot of the inlet multiply. Two four-vane circular pistons counter-rotate inner the turbocharger at capable 23,000 rpm. Two charge-air coolers are merged into the trapping and are affiliated to a reprint coolant circle. An telling range of measures keeps the disturbance generated by the compressor to a minimal.
The engine-driven whang that powers the mechanical courser provides full-of-the-moon stab correct from idleness swiftness. The 3.0 TFSI delivers its utmost 440 Nm (324.53 lb-ft) at 2,500 rpm and maintains this incessantly until 4,850 rpm. In fourthly cogwheel, the fomite accelerates from 80 to 120 km/h (49.71 to 74.56 mph) in equitable 4.4 seconds. Thanks to the exceedingly short-change gas paths, the heavy, charged V6 responds impromptu to the gun, tied more so than a course aspirated locomotive of the like supplanting.
Moreover, the new 3.0 TFSI achieves warning fire efficiency. On norm, the saloon uses 9.7 liters of fire per 100 km (24.25 US mpg), and the Avant 9.9 liters per 100 km (23.76 US mpg) – an advance of 3.4 liters (26 percentage) compared with its harbinger. The Audi engineering of gasolene mastermind shot was what made this bang-up efficiency potential primarily. Different established concepts, it allows the compressor to be situated butt the throttle. In scene of the rarity of the ingestion air at piles under supercharging story and when coasting, its rotors are free-running and the sum of ability requisite to cause them is low.
Dynamism and efficiency: The new seven-speed S tronic
The V6 superpower in the new Audi S4 and Audi S4 Avant flows into a six-speed transmittance, fitted as measure, which shifts rapidly and just. As an selection, Audi offers a state-of-the-art dual-clutch contagion – the seven-speed S tronic is highly dynamical and extremely effective. The driver has the pick of impulsive in full reflex way or selecting the gears with paddles on the wheel or now with the sack jimmy – all of which furnish imposingly straightaway gearshifts. The gearstick feeling is active, comfy and rattling accurate – typically Audi.
The seven-speed S tronic consists of two branch transmissions and uses two multidisk grasp that restraint the versatile gears. The prominent K1 batch guides the ability via a upstanding calamus to the pinions for gears 1, 3, 5 and 7. A dig dick rotates roughly the whole calamus; it is affiliated to the concordat K2 hold, which is merged inside its bigger similitude and controls the pinions for gears 2, 4, 6 and reverse.
Both transmitting structures are ceaselessly combat-ready, but lonesome one is powered at a meter by the locomotive. E.g., when the driver accelerates in third, the one-fourth gearing is already busy in the indorsement transmittance construction. The unfirm appendage takes office as the grip changes – K1 opens and K2 closes with lightning speeding. This serve takes but a few hundredths of a arcsecond and is realised without interrupting grip. It is so well-fixed and placid that the driver scarcely notices it.
The seven-speed S tronic is intentional for utmost efficiency. It operates with selfsame eminent efficiency and its level-headed command arrangement maximizes fire thriftiness in automatonlike manner. With its wide-cut gearing proportion bedspread of 8.0:1 the seven-speed S tronic well exploits the howling superpower and superscript torsion of the 3.0 TFSI.
The quattro lasting all-wheel campaign scheme transfers mightiness to the route with sovereign informality. Nether veritable drive weather, it sends 40 pct of its torsion to the forepart wheels and 60 pct to the bum wheels – a slenderly rear-biased, showy feature. Where requisite, it can depart dispersion inside fractions of a sec.
The quattro crusade organisation ensures dependable self-steering characteristics, mellow constancy and fantabulous grip in compare with rear-wheel-drive competitors.
Customized torque distribution: The sport differential with Audi drive select
The new, fighting mutant derivative ideally complements the quattro crusade organization and lends it flush greater captivation. When the wheel is off or the car accelerated in a quoin, mightiness is redirected in a controlled way to the outer backside roll, literally push the fomite done the tree. The arrangement intervenes to buffet any signs of understeer or oversteer. For the driver, this way rock-bottom exertion at the wheel and fifty-fifty higher sidelong speedup.
The dynamic mutation derivative is a new eccentric of rear-axle derivative. A superposition appurtenance was added to both the odd and rectify sides of the definitive derivative; it rotates tenth quicker than the roll’s driving quill.
Both components can be affiliated done a multidisk grip, which runs in an oil bathe, and is operated by an electro-hydraulic actuator. In nearly drive situations, the clench can deviate well-nigh the finish stimulant torsion to one rack therein way.
Controlled by an range of sensors and a high-velocity estimator, the fighting play derivative necessarily less than 100 milliseconds to airt powerfulness. Drivers can conform their style of drive, on with characteristics for the payload changes, to ternary functioning maps. Different competitors’ systems, the Audi mutation derivative is good as good when the locomotive is impulsive the wheels as it is on the overproduction or when the car is coasting freely.
The new Audi S4 and Audi S4 Avant are well-trained athletes. Their five-link movement axle and the self-tracking trapezoidal-link bottom axle are of a extremely advanced pattern; both axles are made most all of aluminium and are hence selfsame whippersnapper. The low-mounted guidance paraphernalia transmits the direction forces to the wheels without any lag meter and gives the driver a exact and sensible route look.
The spontaneousness of Audi’s new midsize athletes is entrancing, and they have the accurate reactions of a pedigree sports car. In these transmissions, the derivative is positioned ahead of the hold, which made it potential to motion the locomotive 154 mm (6.06 in) forrader compared with the forerunner example. This strange layout dead evens out the axle dozens, and too affords the longsighted wheelbase of 2,811 mm (9.22 ft) exceeding stableness.
The form of both new S models standard stiffer axle bearings, and the sportsmanlike tuning with cadaver jounce absorbers puts the frame 20 mm (0.79 in) nigher to the route. Brobdingnagian high-performance and fade-resistant brakes sit backside the 18-inch and optional 19-inch hurl al wheels. The black-painted bracken calipers – at the figurehead with the S4 logotype – clutch the ventilated disks with new highly-developed bracken pads.
Audi drive select: The driving dynamics system
The Audi cause quality drive kinetics arrangement is a boost high-end engineering featured on the new Audi S4 and Audi S4 Avant. It accesses the accelerator reply characteristics, the switch points for the seven-speed S tronic and supports the speed-dependent servotronic direction. With the imperativeness of a push, the driver can resolve whether these systems should lock in “puff,” “machine” or “dynamical” modality. If the fomite is furnished with the MMI os, a quaternary style is uncommitted which the driver can plan according to his own personal tastes and preferences.
Audi thrust choose can lonesome be logical in compounding with one or more of ternary extra technologies – the mutation derivative, adaptative command for the cushion absorbers, or dynamical steerage, which is an extra hi-tech result. Its zero-play superposition train, which is impelled by an galvanising centrifugal, varies the proportion by well-nigh 100 pct contingent the hurrying organism compulsive. In damage of driver rubber, the dynamical direction assists the ESP stabilisation programme by victimisation direction interposition to donjon the new Audi S4 and Audi S4 Avant on rail when cornering at the treatment limits. In many instances, the scheme renders ESP intercession spare.
For the adaptative muffler ascendance organisation, hydraulic gas-pressurized cushion absorbers are exploited which manoeuver by substance of extra, electrically actuated valves. They ascendence the catamenia of hydraulic liquified, frankincense regulation the shock-absorbing characteristics. A high-performance controller whole analyzes the signals it receives from 14 sensors, and calculates the damping exponent for apiece mortal rack 1,000 multiplication per arcsecond.
An athletic look: The design
Both the Audi S4 and the Audi S4 Avant feeling acrobatic and powerful on the route. Approximately of the almost salient modifications to the outside invention are the extra aprons, the aluminum-look outside mirrors, the 18-inch S-design light-alloy wheels, the english cradle panels, the guarded despoiler at the behind and the quartette exhaust. The xe addition headlights with daylight working lights and the back lights are foster classifiable touches.
The home too underscores the sporting expertness that is the stylemark of both new S models. The sports seating let galvanic lumbar supports and pull-out thigh supports, and the panel features grayness dials with whiteness needles. They too wear the S4 emblems, as do the multifunction mutation wheel and the key. The inside is in nigrify, with fleecy aluminium inlays. C and birchen romance inlays are besides usable, as are stainless interlock inlays.
Optional aid systems supply the driver with eventide greater command on the route. The adaptative sail ascendence (ACC) regulates the aloofness to the fomite ahead, and braking ward issues warnings regarding potential rear-end collisions. The Audi position attend makes ever-changing lanes safer; the Audi parking scheme sophisticated makes support into a parking blank easier.
With esteem to multimedia, Audi offers an attractive engineering box. The communications and amusement technologies portfolio includes the competition-beating MMI os, respective types of wireless and voice systems clear capable the high-end answer from Smash & Olufsen, two sailing systems, an iPod port, and a extremely commodious Bluetooth car sound.
Epicurean features such as the three-zone gilded automatonlike air conditioning and the dynamical cornering lighter organization known as adaptative spark round the optional equipment.