Under the hood of the riveting Audi RS6 Avant, lies a twin-turbocharged, 4.0-liter, V-8 engine that produces 560 horsepower. Without doubt, this has been the most forceful sports wagon so far. Gerrman tuner O.CT Tuning was challenged to make the best even better, so the O.CT team designed a new tuning kit for it.

The tuner presented two stage upgrades. Stage 1 boost the V-8 engine to produce a vibrant 670 horsepower and reach a peak torque of 649 pound-feet.

With the additional 110 horsepower, the RS6 runs from 0 to 60 in 3.4 second. There is a 190 mph top speed, and by adjusting an alternative set of tires the RS6 scores even 200 mph.

The Stage 2 upgrade features additional sports exhaust system which delivers 10 horsepower more to the produced output level by stage 1.

The pricing tag for the RS6 Avant ranges from £77,000 to about $124,000.

Make: Audi
Model: RS6
Engine: V8
Horsepower @ RPM: 670
Torque @ RPM: 649
Displacement: 4.0 L
0-60 Time: 3.4 sec.
Top Speed: 200 mph