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Lincoln loses to Washington in new test for tire-tread depth

Buried deep in a press release from Tire Rack is a bombshell. No longer is the Lincoln-head penny the true test for replacing your tires. It will now be known as the Washington-head quarter test.

Video: The Porsche Panamera Sport Turismo concept build process

Porsche has released a video featuring Style Director Michael Mauer charting the design process of the Panamera Sport Turismo concept. The 10-minute YouTube video, which also features General Manager Advanced Design Style Mitja Rorkert, follows the build process through each modeling phase right up until the presentation of the show car at this year's Paris motor show. "It always presents a special challenge when we develop a new kind of car for the Porsche brand," says Mauer, "precisely because we haven't been in the segment before, and the question of whether it matches the Porsche brand always looms in the background." We were impressed at the Panamera Sport Turismo concept's unveiling, particularly with its stance and detail execution, so the video is a chance to see just how this concept came into being.

Volvo tuner Polestar reveals production S60 and V60 models

It's not every day that we can tell you about a performance-tuned station wagon that is actually coming to the U.S., but today is one of those rare days. Volvo racing and aftermarket tuning specialist Polestar has revealed details of their production versions of the V60 wagon and the S60 sedan, which are bound for the U.S. The S60 and V60's 3.0-liter T6 engine has been tuned to produce 350 hp and 369 lb-ft of torque, which is said to give it a 0 to 62 mph time of 4.9 seconds, on the way to an electronically limited top speed of 155 mph.