One of the rarest Porsches in existence, the 1951 356 SL Gmünd Coupe, has been returned to its original glory and is featured in a new video and gallery. It’s the first Porsche sports car converted for racing, and it’s the first to claim a victory for the Porsche marque, in the 24 Hours of Le Mans no less.

Alfa Romeo’s new Stelvio SUV is just a month out from its world debut at the 2016 Los Angeles auto show, and the latest prototypes are wearing the least bit of camouflage yet. The Stelvio will target the BMW X3, while two additional Alfa Romeo SUVs will go after BMW’s X1 and X5.

Ford Motor Company [NYSE:F] is offering factory performance upgrades for its Mustang. The most potent of these is designed for the Mustang GT and sees output bumped to 472 horsepower. They come at a time when Mustang sales have stalled, likely in anticipation of a facelifted model due in 2017.

You'll find all these stories and more in today's car news, right here at Motor Authority.

Meet the grand daddy of all Porsche race cars, the 1951 356 SL Gmünd Coupe

2018 Alfa Romeo Stelvio spy shots

Mustang EcoBoost boasts V-8 torque thanks to Ford Performance upgrade

German officials call Tesla Autopilot a 'traffic hazard'

Ban on gas and diesel cars gains momentum in Germany

Hydrogen fuel station finder app launched by Air Liquide

The Mercedes Unimog turns 70

2017 Toyota Prius Prime rated at impressive 133 MPGe

Lister CEO offers up Bentley Mulsanne on eBay with no reserve

EPA proposes to add more ethanol blends to 'Flex Fuel' category