ABT Sportsline is already offering certain conversion packages for the Audi S4 and RS4, but their latest work revolves around the regular A4 models, of the B9 generation.

With their own engine control units, the tuner can lift the output of the four- and six-cylinder petrol and diesel engines, claiming as much as 325 PS (320 hp / 239 kW) and 660 Nm (487 lb-ft) of torque when it comes to the 3.0-liter TDI.

That’s a 53 PS (52 hp / 39 kW) and 50 Nm (37 lb-ft) of torque increase over the stock car, while the ECU tune includes more power for the lesser version, too, 250 PS (246 hp / 184 kW) and 450 Nm (332 lb-ft) of torque, up from the standard 218 PS (215 hp / 160 kW) and 400 Nm (295 lb-ft) of torque.

The 2.0-liter TDI with 190 PS (187 hp / 140 kW) and 400 Nm (lb-ft) of torque is now making 215 PS (212 hp / 158 kW) and 440 Nm (325 lb-ft) of torque, and the 2.0-liter TSI petrol unit gets boosted to 330 PS (325 hp / 243 kW) and 440 Nm (325 lb-ft) of torque, up from 252 PS (248hp / 185 kW) and 370 Nm (273 lb-ft) of torque.

For the right sum, ABT will throw in new suspension springs and a few aftermarket parts for the exterior too, such as add-ons for the grille, front and rear bumpers, and fender inserts. Joining them are the new tailpipes and one of four rim choices available in different sizes and finishes, including the 20-inch ones equipping the Audi A4 Avant pictured below.

Greeting users inside are the integrated entrance lights, push-button start cover and the carbon fiber gearstick.