Audi's high-performance TT-RS has been spied undergoing testing.

Audi's high-performance TT-RS has been spied undergoing testing.

Looking decidedly more aggressive than the standard model, the RS variant features a sportier front bumper and a revised grille with mesh inserts.  The model also has revised side skirts, a new rear bumper and a dual exhaust system with larger tailpipes.  We can also see attractive alloy wheels which are backed up by a high-performance braking system.

If the sporty styling hasn't won you over, perhaps the performance will as rumors suggest the car will have a turbocharged 2.5-liter five-cylinder engine that develops up to 380 PS (279 kW).  This could enable the all-wheel drive model to rocket from 0-100 km/h in four seconds or less.

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