Bmw’s new tri-turbo 3.0-litre in-line six-cylinder diesel engine becoming reality

Article by Christian Andrei, on November 23, 2011

The upcoming 550dX of BMW may be the first recipient of the automaker's new tri-turbo 3.0-litre in-line six-cylinder diesel engine, according to the details leaked from a dealer conference held in Holland this week. The 550dX was revealed by Autocar back in early September. The new engine is destined for new X6xDrive550d and X5xDrive550d models.

It is claimed to deliver 376bhp and at least 516lb ft of torque, around 70bhp and 74lb ft more than the most powerful variant of the automaker's existing twin-turbocharged 3.0-litre in-line six-cylinder diesel engine.

The radical new engine is rumored to utilize two traditional exhaust blown turbochargers with an electrically driven turbocharger to added low-end response. The engine is set to be offered exclusively with eight speed automatic gearbox and four-wheel drive. BMW will add the 550dX in its lineup, higher than the 535d. However, nothing is official as of the moment.

Munich insiders hint that its 0-62mph acceleration time is about 5.0sec, providing a top speed of 155mph. Combined cycle fuel consumption is said to come close to matching the 535d’s 46mpg and 165g/km average carbon dioxide emission rating. Together with the standard variant of the 550dX, the automaker is also planning a performance-oriented M550dX.

According to highly placed BMW sources, this model receives various chassis and styling tweaks even if it is still not yet an official M model. Original plans for a complete M5 diesel were dismissed because the 550dX’s four-wheel drive system would have dictated the ride height, an insider disclosed.

Topics: bmw, engine, diesel

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