By Andrew Ganz
Friday, Feb 17th, 2012 @ 4:42 am
 
Confirming one of the worst kept secrets in the industry, BMW has announced that its naturally-aspirated inline six-cylinder engine will be almost entirely phased out of its North American lineup for 2013, when its X3 crossover gains a turbocharged four-cylinder engine.

Simple straight six motors have been a BMW hallmark for decades, but the German automaker is now firmly entrenched in the world of turbocharging as it moves to boosted lower-displacement engines. (The automaker's 1-Series coupe also used the naturally-aspirated 3.0-liter inline six in 2012, but that model is expected to be replaced by an exclusively turbocharged 2-Series for 2013).


First appearing in the Z4 roadster and 5-Series sedan before making its way to the 2013 3-Series that is just now hitting dealers, the X3's new 2.0-liter turbocharged four-cylinder joins a carryover 3.0-liter turbocharged inline six. In the 2013 X3, the four-cylinder is rated at 240 horsepower at 5,000 rpm and 260 lb-ft. of torque from 1,250 to 4,8000 rpm. Horsepower remains the same as the outgoing model, but torque is up 39 lb-ft. and it is spread across a wider swathe of the rev range. The engine makes use variable valve and camshaft timing and a single twin-scroll turbocharger to produce its power, while an automatic start/stop system reduces emissions and saves fuel. BMW hasn't specified fuel economy for the new model, but an EPA highway figure above 30 mpg is likely.

BMW's xDrive all-wheel-drive system remains standard, as does an eight-speed automatic transmission. Despite the arrival of a new engine, the entry-level X3 retains its xDrive28i nomenclature.

The uplevel xDrive35i returns mostly unchanged for 2013, although its 3.0-liter twin-scroll single turbocharged inline six-cylinder engine gains the same start/stop system used in the xDrive28i.

No styling changes are expected, although BMW has not released any images of the 2013s (the 2012s are pictured).

The reduced cylinder count brings with it a price hike to $39,395 including a mandatory $895 destination charge for the xDrive28i and $44,495 for the xDrive35i. BMW says those prices represent a $1,400 and $900 hike, respectively.

Some minor option shuffling means that a power tailgate is now standard on all models, while the optional Driver Assistance Package now includes lane departure warning and the similarly optional M Sport Package now comes with 19 inch wheels on the xDrive28i.

BMW says that the 2013 X3 will go into production at its Spartanburg, South Carolina, assembly plant in April before arriving in dealers in May.