The new Audi RS6 Avant is powered by a twin-turbocharged, 4.0-liter, V-8 engine that delivers a total of 560 horsepower, making it one of the most powerful sports wagons out there. Even the best can be better sometime, so the German tuner O.CT Tuning found a solution to improve this output even further.

The tuner is offering two stages of upgrades for the RS6->ke1305. In Stage 1, the engine electronics are heavily modified, pushing the V-8 engine to a blistering 670 horsepower and a peak torque of 649 pound-feet.

With the extra 110 horsepower under the hood, the RS6 awakens to a tune of 0 to 60 in 3.4 second. Top speed is increased to 190 mph, but an optional set of tires allow O.CT to unharness the RS6 to a top speed of 200 mph.

A Stage 2 upgrade is also available, and it includes an additional sports exhaust system that adds another 10 horsepower to the output level delivered by stage 1.

Click past the jump to read more about the Audi RS6.

Audi RS6 by OCT Tuning in Detail

The Audi RS6 Avant is already a sick-looking rig, so O.CT Tuning opted to keep all of its focus on pumping the most power from the V-8 powerplant. Still, that black exterior paint draped on this wagon is simply sinister.

Front Detail

Profile Detail

Rear Detail

Audi RS6 Avant

Audi unveiled the new RS6 Avant in 2012, and it may be the best A6 ever. It is about 220 pounds lighter than its predecessor, more powerful, faster, and of course, better looking.

The new RS6 Avant is powered by a twin-turbocharged, 4.0-liter, V-8 engine that delivers a total of 560 horsepower between 5,700 and 6,700 rpm, and 516.29 pound-feet of torque between 1,750 and 5,500 rpm. This output is enough to sprint the car from 0 to 60 mph in 3.9 seconds and up to an electronically limited top speed of 155 mph. An optional Dynamic Plus package will increase top speed to 189 mph.

The RS6 Avant is priced from £77,000 - about $124,000 at the current exchange rates.