The Audi RS6 Avant is immensely fast straight out of the box, but this one has been modified to churn out a truly massive output.

Filmed during the ‘Rolling 50-1,000’ drag racing from a rolling start against some other tuned machines from BMW and Porsche, the executive estate is said to have as much as 900 horses, after being tuned by Klasen-Motors.

If the number, provided by the video uploader, is correct, then it means that this Audi RS6 Avant is actually more powerful not only than the Ferrari 488 GTB, but the Lamborghini Aventador S as well, and is on par with the Porsche 918 Spyder, which makes 900PS (887hp).

In stock form, the RS6 has 560PS (552hp) and 700Nm (516lb-ft) of torque, coming from a 4.0-liter twin-turbo V8 engine, or 605PS (597hp) and 750Nm (516lb-ft) of torque, in the Performance guise. The second version needs just 3.7sec to sprint from 0-100km/h (62mph), so this tuned example, with its extra 300 HP, definitely slashes that time by quite some margin.

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