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We Hear: BMW 7 Series Could Add Quad-Turbo Diesel Engine

Motor Trend logo Motor Trend 7/31/2015 Jake Holmes
2016 BMW 750Li xDrive© Provided by MotorTrend 2016 BMW 750Li xDrive

Just when it seemed like twin-turbocharged engines were all the rage, BMW engineers decided to double up on the forced-induction technology. According to Autocar, BMW is now developing a quad-turbocharged diesel engine that will first see use in a high-performance version of the new 7 Series luxury sedan.

The 3.0-liter inline-six engine will build on BMW's existing triple-turbo diesel engine that's already offered in the M550d in Europe. While the first three turbochargers will be conventional exhaust-driven ones, Autocar reports that the new engine's fourth turbo will be electrically powered. That could boost the 3.0-liter diesel's output to 400 hp and a whopping 590 lb-ft of torque. The current BMW M550d packs 376 hp and 545 lb-ft.

We Hear: BMW 7 Series Could Add Quad-Turbo Diesel Engine

BMW has never built a factory-baked M version of the 7 Series luxury sedan, but an M750d version would follow in the footsteps of milder M Performance cars like the BMW M235i coupe and convertible. In addition to the BMW 750d, Autocar reports that this new quad-turbo diesel engine could also see duty in the BMW X5, X6, and X7 crossovers.

It remains to be seen whether the eventual BMW M750d would be sold in the U.S., given that our market has typically not received high-powered BMW diesels in the past, like the aforementioned M550d cars.

The new BMW M750d could launch next year.

Source: Autocar

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