BMW AG will be expanding the use of its TwinPower Turbo package to 4- and 3-cylinder engines – comprising both gasoline and diesel variants. In 2009, this package, which features a combination of twin-scroll turbocharging, direct gasoline injection and fully variable Valvetronic valve management systems, had debuted in a 6-cylinder 3.0-liter gasoline engine that powered the 5-series GT midsized model. At the recently held Geneva auto show
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