2012 BMW 528i First Drive - Edmunds.com
Many years and generations ago, the 528i was the turbine-smooth, six-cylinder pinnacle of the 5 Series range. This engine capacity first appeared late in the life of the original 5 Series in 1979, last appeared two generations ago and reemerges today as the entry model of the current 5 Series lineup. The 2012 BMW 528i engine is now a 2. 0-liter turbocharged four-cylinder. The mill even looks downsized when you open the hood, a sizable void yawning between the nose of the engine and its radiator, yet it generates a promising 240 horsepower — identical to that of the outgoing 2011 six-cylinder 528i, but boasting an... The 2012 528i improves on the 2011 model's fuel economy by 1 mpg city and 2 mpg highway and achieves an EPA rating of 23 city/34 highway mpg. But the key to this new engine's fuel-sipping strength is a single twin-scroll turbocharger that functions in concert with a number of well-established BMW technologies. The 528i's four-cylinder routes exhaust gases from each pair of cylinders to a separate turbine inlet to speed the engine's reaction to a twitching right foot. Fuel is fed by precisely metered, solenoid-controlled direct injectors, while refinements to the Valvetronic system have also improved its precision. Source: www.edmunds.com
