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

Revolutionizing the BMW M3

BMW is less than a year away from officially revealing the fifth generation of the menacing M3, the first to receive turbocharged six-cylinder power. The performance sedan, code-named F80, is expected to appear as a lightly veiled concept at the 2013 Geneva motor show, debuting the appearance and mechanical package of the M division's eagerly anticipated Mercedes-Benz C63 AMG rival. A showroom-ready version with a production interior arrives at next year's Frankfurt motor show, BMW sources say.

New Cadillac ATS to take on BMW 3 Series (+video)

Cadillac ATS - sorted at the Nurburgring GM has revealed that their new compact Cadillac ATS will debut at the Detroit Auto Show in January and go on sale in late 2012 as a 2013 model. The idea, just a few short years ago, that Cadillac could build a car that was capable of making the Germans look over their shoulder would have been laughable. But the new Cadillac ATS – debuting at Detroit in January – could do just that.

Evolution of the 3: BMW begins sales of sixth-generation sedan

BMW staged the U.S. launch of the sixth generation of the stalwart 3-series at the Detroit auto show this week, which makes this as good a time as any to take a look back at the car that other sports sedans aspire to be. The small sedan hit the scene in 1975, just three years after the 5-series, as a successor to the BMW 1600, the 1600ti and the 2002.