Bottom line: 4-Series coupe diesel will follow shortly after the 3-Series diesel models are available at dealers.BMW Planning Full Diesel Lineup
America may be short on diesel-powered cars now, but BMW appears ready to fix that. Leaked plans suggest that the company is launching diesel engines across its entire lineup, starting with the 3 Series sedan in spring 2013, followed by the 3 Series sport wagon later in the year. The BMW 5 Series sedan will also get a diesel engine, as will the X5 (which is already available in a diesel version). In 2014, the 7 Series and the X3 will receive diesel engines as well, filling out the lineup.
The engines coming to the U.S. include a two-liter four-cylinder turbodiesel, and a three-liter six-cylinder turbodiesel. The four-cylinder diesel will make 180 horsepower and 280 pound-feet of torque, while the inline six will offer 265 horsepower and 425 pound feet—while returning between 30 and 40 mpg on the highway.