Sportec’s New RS425 – The High-Powered Audi S4 Avant

Tuning News | Dean | September 15, 2009 at 16:42

Sportec has once again taken it upon themselves to boost the performance on a soccer-mom-mobile. The Audi S4 Avant has been modified in order to get kiddies to soccer practice on time. Okay, so we’re being a bit sarcastic with the above, but hey there is some truth to it.

Either way, all performance modifications are welcome in our garage, and we’re more than happy to report on them.

So, climbing in to this we find that the Sportec RS425 houses a new sport air filter, a remapped engine ECU and of course the result being more power and torque throughout the gears.

The original, not-so-slow S5 Avant pumps out 245kW where the latest Sportec modified version jumps to 313kW which is almost on par with the older version of the Audi RS6. The torque on the standard model is *only* 440Nm where the RS425 will push out 520Nm.

Acceleration figures are impressive, but then again they only count if little Johnny is late for the soccer game. Sorry – lame joke. The 0-100km/h time comes in at 5.2 seconds where the top speed is limited to 250km/h.

The top speed is limited to 250km/h and this should keep the groceries in tact when traveling home. Yup, thank goodness for limiters, hey.

Because looks are, sometimes, as important as speed the Sportec RS425 features a new carbon fibre spoiler, a sports silencer, four tail pipes, a carbon fibre rear diffuser, a lower suspension system and 20 inch wheels.

Press Release:

Sportec Audi S4 Avant: The Powerful Swiss Estate Car

An Audi S4 with its 333 compressor-PS is no mean thing on its own but the Swiss tuner thinks
differently and by applying specific techniques has pushed the vehicle from Ingolstadt way over the 400 PS mark.

A newly programmed engine control and the installation of a sports air filter coaxes a full 425 PS instead of the standard 333 PS from the three litre V6 compressor. The maximum torque has also been distinctly increased by improving the electronics. Instead of 440 a maximum 520 Nm can now be called upon. A plus factor that is noticeable in the driving dynamics. Whereas the standard Audi S4 needed 5,6 seconds to accelerate from zero to 100 km/h the Sportec RS425 only needs 5,2 seconds. At top speeds, though, they are equal as both vehicles are electronically blocked at 250 km/h.

However Sportec is not content with solely an upgrade. A special sports silencer with four end pipes – two pairs on either side right and left – provide a more sporty sound. A braking system on the front axles enlarged to 380 millimetres ensures improved braking power. On the other hand chassis clearance has been reduced as Sportec has fitted the Audi with a suspension kit shortened by a progressive 25 millimetres.

In addition the Sportec RS425 is fitted with 9 x 20 inch large lightweight metal rims surrounded by 245/30 tyres. The Audi S4’s new look is rounded off with a diffuser at the rear and a spoiler at the front, both of which are made of carbon.