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The 2016 BMW 750d will, reportedly, debut an all-new quad-turbo inline-six diesel engine, according to a report by Bimmertoday. Set to replace the brand’s now-familiar tri-turbo diesel mill next year, the new engine (codenamed B57 TOP) has been slated for operation in other models such as the X5 M50d, X6 M50d and incoming BMW X7 M50d.

While additional information remain scarce for now, reports are indicating that the all-new engine is expected to produce somewhere in the region of 400 hp and 800 Nm of torque – all channelled through an eight-speed automatic transmission. Also, speculations remain on whether or not the quad-turbo diesel engine will actually employ four turbochargers or just three with a fourth electronically-driven unit.

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Obvious benefits from the new quad-turbo setup will likely include an even quicker engine response, a broader powerband and increased performance along with fuel efficiency. As is the case with the current tri-turbo engine in BMW models, the quad-turbo unit is expected to serve exclusively on all-wheel drive models equipped with the brand’s trademark xDrive system.

At the moment, the most powerful diesel engine in the G11-generation BMW 7 Series puts out a total of 265 PS and 620 Nm of torque in the 730d while the quickest model to employ the tri-turbo engine is the F10 BMW M550d xDrive – power figures include 381 hp and 740 Nm of torque.

GALLERY: G11/G12-generation BMW 7 Series