Audi RS 4
The Audi RS4 quattro is the top tier and highest performing version of some specific generations of the Audi A4 range of automobiles.
Like its B5 predecessor, visually, the B7 RS4 differs from its related B7 S4, by having even wider flared front and rear wheel arches (fenders), to allow for a wider axle track. Over the B7 A4, it also includes two larger frontal side air intakes (for the two additional side-mounted coolant radiators). The trim on the saloon and roof rails on the estate are chrome as standard but can also be found in black with the addition of the Optic Pack which includes black front grill, all exterior trim and black roof rails on the estate version. The B7 RS4 also includes an optional adaptive headlights to complement the standard "Xenon Plus" (Bi-Xenon arc) High Intensity Discharge (HID) headlamps, which swivel around corners in conjunction with steering wheel movements. Also standard are daytime running lights (DRLs), found within the main headlamp housings, identical to its related B7 A4 and S4, and use a conventional tungsten filament bulb. An acoustic parking system with front and rear sensors is also standard fitment. Unique carbon fibre interior trims, along with a lap timer within the central Driver Information System (DIS), aluminium pedal caps and footrest, and RS4 logos complete the look.
At the heart of the B7 RS4 powertrain is its unique internal combustion engine. Started by an "Engine Start" button on centre console, motive power comes from a 4.2 litre – 4,163 cubic centimetres (254.0 cu in), V8 engine. This is a 32-valve Fuel Stratified Injection (FSI) all aluminium alloy petrol engine. It is fundamentally based on the existing all-alloy 4.2 V8 from the B6 S4, and sharing many identical parts with the Audi Q7 4.2 FSI V8 engine. The RS4 engine has increased crankcase breathing, low-pressure fuel return system, and a baffled oil sump (to prevent engine lubricant cavitation at high engine speeds and high-G cornering).
Source: Wikipedia, 2011