What is it? The Z4 sDrive 2.8i introduces an engine two-cylinders short of the previous six-cylinder Z4. This powerplant uses a single twin-scroll turbocharger to put out 240 hp and 260 lb.-ft. of torque. Horsepower peaks at 5,000 rpm and torque at just 1,250 rpm, promising low-rpm power right off the line.
BMW promises 20-percent better fuel economy than the old naturally aspirated 3.0-liter inline six. This 2.8i will replace the previous 3.0-liter inline Six in the entry-level Z4.
What’s new or notable? The Z4 sDrive 2.8i will be the first four-cylinder model BMW has sold in the United States in 10 years. Expect this new engine to spread through several models.
When will it be available? Fall 2011