Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

A closer look at the 2015 BMW M3 sedan and M4 coupe: Turbocharged performance is gonna cost you

By the time the 2015 BMW M3 sedan and M4 coupe were revealed at the Detroit auto show, we already knew a lot about what to expect from the Roundel's newest generation of high-performance driving machines. It was no secret, for example, that the new M3 sedan and its two-door counterpart, the M4, will be down two cylinders and a few hundred pounds from their predecessors. Now that we've had a chance to get a look at the cars in production trim, here's a closer look at what's under all the aggressively vented fascias, spoilers and M badges.

Audi Sketches Out Plans For Its New Tt

WITH the launch of its new model just around the corner, Audi has released design sketches as a teaser for its forthcoming third generation TT. The sports coupe has proven to be a popular model for the German firm, and next month will see the unveiling of the latest version at the influential Geneva Motor Show. Although technical details are currently scarce, it’s clear to see that the car’s design is more of an evolutionary step from the current model.

Center stack is new high-stakes battleground; showdown with safety regulators looms

For auto suppliers and gadget companies eager to get a piece of the auto industry, the hottest chunk of vehicle real estate now is the center stack. That corridor of interior space, running from the driver's right hip up through the center of the cockpit to the bottom of the windshield, has become a California gold rush of opportunity. But it is less so for traditional suppliers of molded plastics, cables, levers, buttons and radios.