BMW Four-cylinder unit returns to US
BMW has exclusively announced that a new version four-cylinder 2.0-liter power unit is about to enrich the German brand's US line-up combining twin-scroll turbocharging with high-pressure direct-injection and BMW's VALVETRONIC intake control. Missing on the North American auto scene since 1999, the four-cylinder engine is now back, offering more power (240 horsepower and 260 lb-ft of peak torque) than the automaker's normally aspirated 3.0-liter inline six.
BMW's new four-cylinder 2.0-liter engine tops its peak 240 horsepower at 5,000 rpm, 1,500 rpm lower than in the normally-aspirated 3.0-liter inline six, while its 260 lb-ft comes on stream at just 1,250 revs, which is again 1,500 rpm earlier yet 30% higher than the figures available on the normally aspirated 3.0-liter inline six plant.
These figures are achieved thanks to the engine's twin-scroll turbocharger and exhaust unit, which has two exhaust streams leaving each pair cylinders separate, while the patented BMW VALVETRONIC system and High Precision Injection direct-injection system estimate extremely high-efficiency levels.
The engine's grand premiere is scheduled for the spring of 2011 in several BMW models.