BMW makes some major changes in the engine range for the new BMW 7 Series, and this happens to be the eight-cylinder unit fitted in the BMW 750i xDrive Sedan. However, the new BMW 740i and 740i xDrive boasts of the free-revving ability inherent in all six-cylinder inline engines from BMW, plus a wonderfully eager response. The 3.0-liter unit employs a twin-scroll turbocharger and direct petrol injection technology whose maximum pressure of 5,076 psi ensures the fuel is delivered in extremely precise doses.