The current-generation Audi TT has been on sale in America since 2015, so it's due for a refresh to keep it relevant. To keep it fresh for a few more years, Audi is giving its popular sports car a facelift. Prototypes of the base model have been out testing for a while, but our spies recently spotted the updated hardcore Audi TT RS undergoing some hot weather testing in Europe. Copious amounts of camouflage cover the front, but we're expecting the styling changes to be relative minor compared to the current TT RS.

The grille appears to be slightly wider with new vertical vents alongside it, and the front bumper has been redesigned. The headlights also appear to be slimmer, but that could just be the camouflage deceiving us. Elsewhere, the side skirts look more pronounced than the current model. At the back, the amount of camouflage suggests there will be big changes but they will probably be just as subtle. We can see some minor tweaks to the rear spoiler, and the rear taillights also sport new graphics that make the TT RS look more modern. There could also be some small changes to the rear bumper. Chances are the interior will be updated, too.

The current Audi TT's interior is already loaded with tech, but that probably won't stop Audi updating the infotainment system. It isn't known if the 2019 Audi TT RS facelift will receive a power boost, however. The current model is powered by a turbocharged 2.5-liter five-cylinder unit that produces 395 hp and 354 lb-ft of torque, but we wouldn't be surprised if the facelifted model retains this setup. In the current model, 0-62 mph takes just 3.6 seconds, with power being sent to all four wheels through a seven-speed dual-clutch transmission. Audi is expected to reveal the TT facelift later this year, so we could see the 2019 TT RS debut at the Paris Auto Show in October before it goes on sale early next year.