BMW is downsizing the engine in the 2012 528i, but increasing performance and fuel economy.? The current 3.0-liter in-line six-cylinder engine is being replaced with a new TwinPower Turbo 2.0-liter four-cylinder engine. Like the company?s latest TwinPower Turbo 3.0-liter turbo inline-6, which is used in the 535i, the new 2.0-liter engine will combine high-pressure direct-injection and BMW?s Valvetronic intake control (hence the name: TwinPower) with a forced induction system consisting of a single twin-scroll turbocharger.
The maximum output of 240 horsepower is achieved at 5,000 rpm, 1,500 rpm lower than in the normally-aspirated 3.0-liter inline six-cylinder. The peak torque of 260-lb.ft. starts at just 1,250 rpm. ?Not only is that 30 percent more torque than the previous inline-six, it also peaks 1,500 rpm earlier. ?The vigorous power comes on early and climbs steadily all the way to redline.?
The four-cylinder engine with its all-aluminum crankcase is lighter and more compact than a 6-cylinder engine of equivalent power. The turbocharger is a twin-scroll system.
The cooling effect of the injected fuel also allows for a higher compression ratio than might otherwise be possible. This results in further efficiency improvements. The new engine is mated to BMW?s newest eight-speed automatic transmission. The 2012 528i accelerates from 0 ? 60 mph in 6.2 seconds, 0.4 seconds quicker than the 2011 model and will deliver up 15 percent better fuel efficiency (final EPA results are pending).
The BMW 528i will also feature Engine Auto Start/Stop. This feature switches off the engine when the car is stationary at traffic lights or in slow-moving traffic in order to minimize idling.
For 2012 528i is offered for the first time with xDrive all-wheel drive as an option.? BMW xDrive provides the reassurance of sure-footed traction in all weather and road conditions, but it also makes driving on dry surfaces safer. ?BMW?s Integrated Chassis Management (ICM) is able to identify and limit understeer by shifting torque rearward (initially 80% to the rear axle) while preserving the stability. As a second step, ICM can then apply a precise combination of throttle and individual rear-corner braking in order to maintain neutral handling in a corner – regardless of road surface conditions.
Every BMW xDrive model receives standard Hill Descent Control. This selectable function allows the driver to descend slopes in extremely slippery conditions while maintaining control at a pre-set speed.
The new four-cylinder turbo BMW 528i arrives at U.S. dealership in Fall 2011.
