Text and pictures courtesy of Audi AG
Another Audi sports model with a strong personality is about to leave the starting grid: the Audi S4 Cabriolet. This car combines the qualities of the Cabriolet with the powerful V8 engine from the Audi S4 and the dynamic handling of the quattro driveline. Restrained visual changes underline its sports character.
Design and equipment
The new Audi S4 Cabriolet expresses its supremacy by adopting a deliberately restrained appearance. A closer look, however, reveals that this stylish, sporty body is indeed subtly different in its basic form and proportions from the other Audi A4 Cabriolets: the bumper has large air inlets, the xenon headlights have a titanium-coloured surround behind the glass and the outside mirror housings have been given an aluminium finish. A glance at the rear reveals the powerful exhaust tailpipes on both sides that are so typical of the Audi S models. The Audi S4 Cabriolet runs on 18-inch cast aluminium wheels of S design with 235/40 R 18 tyres.
Inside too, this Cabriolet is immediately identifiable as an S4. The instrument cluster has the grey dials that are characteristic of S models and special needles. There is a choice of carbon fibre, piano finish, brushed aluminium and birch wood for the inlays. The car's sporty character is emphasised by the three-spoke leather-covered sports steering wheel with S emblem. There are shift paddles behind the steering wheel on cars with the 6-speed tiptronic transmission.
The Alcantara/leather sports seats, which have a lumbar support, an adjustable thigh support and can be electrically adjusted in several directions, provide firm lateral support and excellent comfort on long journeys.
The V8 engine: a torrent of power
The Audi S4 Cabriolet's eight-cylinder engine develops 253 kW (344 bhp) at 7,000 rpm, and delivers a massive 410 Newton-metres of torque to the crankshaft at 3,500 rpm. Such impressive figures are a sure sign of the superiority of this large-capacity, naturally-aspirated engine. Possibly even more impressive than its peak power output is the immediacy with which it responds to every movement of the accelerator pedal, and its remarkable willingness to run freely up to high revs. The exhaust system produces a deep, sporty note, always present but never obtrusive.
The Audi S4 Cabriolet sprints from 0 to 100 km/h in only 5.9 seconds, and reaches a top speed of 250 km/h, at which point the governor cuts in smoothly.
The eight-cylinder engine surprises the onlooker in yet another way: it is shorter and more compact than any other engine of this type and size, measuring only 464 millimetres from front to back. Audi's engine developers achieved this by moving the chain drive for the camshafts and auxiliaries to the output end of the engine, thus reducing its overall length by 52 mm. The weight is also extremely low for an engine with eight cylinders, at only 195 kilograms. This has definite advantages in terms of the car's weight distribution and road dynamics.
Power is delivered to the 18-inch cast aluminium wheels via a 6-speed close-ratio gearbox of the latest model generation with a precise shift action and short lever travel. The selector mechanism is decoupled, which largely prevents load-reversal movements or vibrations from being transmitted to the gear lever.
Available as an optional extra, the 6-speed tiptronic transmission with dynamic shift program, additional Sport program and shift paddles on the steering wheel combines sports-style driving with the convenience of an automatic transmission and is therefore ideal for smooth, relaxed travel in an open car.
The sports suspension: aluminium makes the car agile
The lightweight aluminium chassis consists of four-link front and trapezoidal-link rear suspension, and is designed to ensure maximum steering precision and clearly defined road behaviour with excellent lateral stability. Ride comfort also benefits from this ingenious suspension design, since low unsprung weight makes the suspension more responsive to road-surface irregularities.
Like the S4 saloon and Avant, the S4 Cabriolet has firm sports suspension settings - an important precondition for agility and thus for pure driving pleasure.
The servotronic steering is a standard feature; it varies the degree of power assistance according to road speed, so that the correct combination of steering precision and light action is always obtained.
The quattro driveline: driving fun and ample traction
The new Audi S4 Cabriolet has quattro permanent four-wheel drive as a standard feature. It can therefore translate engine power into optimal progress in any conditions and exploit the dynamic potential of its aluminium chassis with a new degree of supremacy. In other words: driving pleasure in the purest sense.
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