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AMG Action! Mercedes eyes new naturally aspirated V8

Mercedes-Benz has selected the twin turbocharged 5.5-liter V8 engine to power the recently unveiled S63 AMG, CL63 AMG and CLS63 AMG, with ratings between 525 hp and 577 hp. But it's going to be a different story for the successor to the SLK55 AMG set to be revealed at next year's Frankfurt motor show. Sources within the Stuttgart headquarters suggest the new performance roadster is earmarked to receive a yet-to-be revealed naturally aspirated version of Mercedes-Benz's new 5.5-liter V8.

Porsche Panamera to get new V6 engine

Porsche will reveal two new 3.6 V6 petrol versions of the Panamera at the Beijing motor show 2010. These are the first official photos of the new models, the Panamera and Panamera 4, which will be offered as cheaper alternatives to the S, 4S and Turbo versions. In the rear-wheel drive entry-level Porsche Panamera, the new 296bhp, 295lb ft V6 powerplant produces 265g/km of CO2 and will manage just 25 miles on a gallon of fuel.

Future products: Buick sees 6 to 7 models in its lineup for 2011-13

A Buick LaCrosse hybrid sedan probably will join a new small car and new crossover as Buick expands its lineup in the next three model years. The brand, which sells four nameplates now, eventually wants a six- or seven-vehicle lineup, says John Schwegman, Buick-GMC's top marketer. Buick seeks to revive its reputation for performance and stylish luxury to appeal to middle-aged professionals who often buy Asian luxury brands.