2010 BMW 328i

Recently, we reported on the Mercedes-Benz plan to go from six cylinders to four cylinders and it appears to be catching. BMW released a statement this month saying that the company will bring the first four-cylinder turbocharged engine to the U.S. later this year. The question that remains is which vehicle will get it. Before we begin to speculate, the four-cylinder we are talking about is the 2.0-liter twin-scroll turbocharged four-cylinder with high-pressure direct-injection. The first car we saw this engine in was the BMW X1 compact crossover—a car that we expect Mercedes-Benz to...