With automakers scrambling to meet stricter fuel economy and emissions standards, four-cylinder powerplants with turbocharging are becoming increasingly popular these days. Even BMW has jumped on the bandwagon with the release of a new 2.0-liter TwinPower Turbo 4-Cylinder unit that made its debut on the X1. Today, BMW announced that the Z4 hardtop-roadster will be the first U.S. model to receive the force-fed four-pot.
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