Hyundai's popular compact car will see a mid-cycle refresh for 2015. Will it include any powertrain changes?

Hyundai has published two teaser images that preview the facelifted Elantra that will bow as a 2014 or a 2015 model. Expected to debut as soon as the Los Angeles Auto Show this fall, the revised Elantra will gain styling more like its bigger Azera brother, as well as a revised interior.

The teaser images reveal little, but an Elantra owner and contributor to Hyundai-Forums.com happened upon a camouflaged Elantra facelift in Southern California. He was able to capture a quick video of the car.

From the spy photos captured last month in the American southwest, it's clear that the Elantra will gain new front and rear fascias. The more streamlined look up front is likely to contain some of the chrome-like bits seen on Elantra's bigger brothers. Oddly, Hyundai moved its fascia design in two directions - the subcompact Accent and compact Elantra are more angular, while the Azera and Sonata have a swept-back look.

One thing that's not known is just what Hyundai plans to do under the Elantra's hood. Currently, the car offers only a 148-horsepower 1.8-liter four-cylinder, but its Kia Forte kissing cousin - which was redesigned for 2014 - boasts that 1.8-liter and an optional 173-pony 2.0-liter.

Conversely, Hyundai might also look to the sportier Veloster (and the upcoming Kia Forte5) for a 201-horsepower 1.6-liter turbocharged four-cylinder.

Buyers outside of the United States (where the Elantra is sometimes dubbed the Avante) will have access to a new turbodiesel four-cylinder engine.

Elantra has performed well for Hyundai - it is routinely one of the best-selling compact ranges, especially in terms of more profitable consumer sales (rivals tend to focus on fleet sales in addition to dealer deliveries more than Hyundai does).