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Cummins works on a 28-mpg diesel with V8 power for pickups

Cummins Inc. is developing a four-cylinder diesel engine aimed at giving full-sized, light-duty pickups the power of a small V-8 and overall fuel economy of 28 mpg. The project began in September using the Nissan Titan pickup, which is being used to test the engine, pickuptruck.com reports.

BMW offers new M Performance accessories for M5 and M6

Tuners Alpina and AC Schnitzer aren't the only ones offering just about everything in carbon fiber for BMWs these days, and BMW has introduced performance accessories for their M5 and M6 cars, including the M6 Gran Coupe, Convertible, and Coupe. On the performance front, car owners will be able to purchase and retrofit an exhaust system developed by BMW's M division and engineering company Akrapovič -- one made entirely of titanium. This new exhaust system will be available for the M5, and all versions of the M6 and will result in a weight savings of approximately 22 pounds.

Alpina B6 xDrive boosts Gran Coupe to 540 hp

The 2015 BMW Alpina B6 xDrive Gran Coupe was revealed on Wednesday. The new super-coupe will make its North American debut next month at the New York auto show and go on sale immediately after. The Alpina B6 is based on the 6-series Gran Coupe (and thus features four doors, despite the name).