Audi Allroad Quattro
The Audi allroad quattro and the subsequent Audi A6 allroad quattro are crossover estate executive cars, manufactured and marketed since 1999. The allroad quattro is based on the Avant version of the Audi A6.
The first generation allroad shares its platform with the second generation "C5" Audi A6 executive car, and its rear end is almost identical to the A6 Avant, the estate version. The main differences are an advanced air suspension system, larger wheels with all-terrain tires, and flared and unpainted bumpers, giving it a distinct appearance and more overall flexibility over varying terrain.
Audi's trademark Torsen-based quattro permanent four-wheel drive system is standard equipment for all versions.
The Audi allroad was designed with the capability to tackle rough road conditions in mind; its standard adjustable air suspension system can lift the car high enough to provide 208 mm (8 in) of ground clearance and a low-range mode absent from other quattro-equipped vehicles, can be selected with the touch of a button. When used together, the two systems made it possible for the allroad to complete an official Land Rover test-course, thus far it is the only car-based SUV that has been proven capable of doing so in testing.
Conversely, the air suspension can lower the vehicle down to only 142 mm (6 in) above road level, and simultaneously stiffen the spring and damper rates to provide a sporty driving experience, much like that of the conventional A6 with the sports suspension.
Audi's 2.7 L, twin-turbo V6 gasoline engine with 247 hp of power and 350 N·m (258 lb·ft) of peak torque was available initially, alongside the 2.5 L TDI diesel unit with 177 hp and 370 Nm (273 ft·lbf) torque. A variant of the corporate 4.2 V8 gasoline engine, shared with the Audi S4, was made available in 2003, and a less powerful TDI (163 bhp) followed in 2004.
Source: Wikipedia, 2011