After we got our first-taste of the new RS4 through a handful of leaked images earlier today, Audi has now officially pulled the sheets off the flagship model of its A4 series. The RS4 makes its comeback as a station wagon featuring the same 4.2-liter V8 engine found in the RS5 models. The naturally aspirated eight-cylinder unit is good for 450PS (444bhp) at 8,250 rpm and a peak torque of 430 Nm (317.15 lb-ft) available from 4,000 to 6,000 rpm. That's a 30bhp improvement over the previous RS4. 
Audi's seven-speed S tronic dual-clutch automatic transmission and quattro permanent all-wheel drive with up to 70 percent flowing to the front or as much as 85 percent to the rear with a default 40:60 ratio, transfer power to the road. According to the German automaker, the RS4 Avant can accelerate from zero to 100 km/h (62mph) in 4.7 seconds and reach a governed top speed of 250 km/h (155mph), which can be increased to 280 km/h (174mph) upon request, while consuming less than 11lt/100km on average (21.4mpg US).
