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BMW Z4 sDrive28i Roadster will serve up its engine bay for the new turbocharged 2.0-liter inline-four. Output is rated at 240-horsepower at 5,000 rpm and 260 pound-feet of torque, which arrives at just 1,250 rpm.
Using a combination of direct-injection, BMW’s Valvetronic intake management and a twin-scroll turbo allows the engine to produce V6 power with I4 efficiency. BMW expects to see a 20 percent improvement in fuel efficiency compared to the outgoing motor. The eight-speed automatic transmission will also certainly help the Z4 in the fuel economy fight.
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