The 2016 BMW 7-Series has now been announced, and among the dizzying array of models and trim packages is a plug-in hybrid version.

That makes the awkwardly-named 2016 BMW 740e xDrive the fifth plug-in car from the Bavarian company.

It joins the plug-in hybrid 330e sedan, the X5 xDrive 40e SUV, and the two "i" models--the i3 electric car and i8 plug-in hybrid coupe.

DON'T MISS: 2016 BMW X5 xDrive 40e Plug-In Hybrid SUV To Debut In Shanghai Next Month

The 740e xDrive shares its powertrain with the 2016 BMW X5 xDrive 40e, which was unveiled at the 2015 Shanghai Motor Show and goes on sale later this year.

That means the 7-Series plug-in hybrid gets a 2.0-liter turbocharged four-cylinder gasoline engine, with an electric motor integrated with an eight-speed automatic transmission.

Together, the two power sources drive all four wheels. BMW did not disclose power figures for the 740e xDrive, but the X5 xDrive 40e has a combined output of 309 horsepower and 331 pound-feet of torque.

2016 BMW 7-Series

The pack stores enough energy for an electric-only range of 23 miles. Top speed is limited to 75 mph in electric mode.

To make the most of this range, the navigation system's route-guidance function can also be programmed to find routes that help maximize electric driving.

ALSO SEE: 2016 Mercedes-Benz S550 Plug-In Hybrid: First Drive

When it launches next year, the 740e xDrive will compete directly with the Mercedes-Benz S550e plug-in hybrid.

The Mercedes-Benz model's powertrain includes a 3.0-liter turbocharged V-6 and electric motor, producing a combined 329 hp.

In addition to the plug-in hybrid option, the 2016 7-Series will be offered with a 3.0-liter turbocharged inline-six in 740i guise, and a 4.4-liter twin-turbocharged V-8 in 750i xDrive spec.

2016 BMW 740e xDrive

The 'Carbon Core' passenger cell incorporates lessons learned from the i3 and i8 plug-in cars.

CHECK OUT: Next BMW 7-Series To Use 'Carbon Core' Based on i3 Electric Car Body

It uses a combination of CFRP, aluminum, and high-strength steel to cut weight by up to 190 pounds compared to the previous 7-Series, BMW says.

CFRP is incorporated into structural elements--such as the B-pillars--with steel backing, reducing the amount of metal needed and increasing rigidity as well.

2016 BMW 7-Series

Besides helping to improve fuel economy, BMW is quick to note that these measures help lower the car's center of gravity--improving handling.

Non-hybrid versions of the 2016 BMW 7-Series will arrive in U.S. showrooms this fall, but the 740e xDrive won't make it here until 2016.

Pricing and full EPA fuel-economy data will be available closer to that date.

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