Photo: Florin Profir
Who would've thought we'd reach an era when Ferrari says "no" to quad-turbocharging (Maranello chose not to use this solution for its current V12s), but BMW goes ahead and introduces a diesel engine using this technology?
While the rumor mill has been talking about the Bavarians introducing a quad-turbo oil burner for well over one year now, BMW unveiled its boosted straight-six late last week, at the Vienna engine symposium, as 7post writes.
The three-liter L6 allows the driver to control 394 hp (400 PS), delivered between 4,000 and 4,400 rpm, while the maximum torque sits at 561 lb-ft (760.6 Nm), offered between 2,000 and 3,000 rpm.
Now, before any die-hard diesel fan points out the respectable maximum twist figure could be even more impressive, BMW explains the peak torque was limited by the ZF 8HP tranny.
As for the real-world performance, so far we only know what the unit can do for the 750d xDrive, as it allows the lavish sedan to complete the 0 to 60 mph (96 km/h) sprint in 4.5 seconds, while having to face the good old 155 mph (250 km/h) electronic speed limiter.
So far, we don't have too many efficiency figures, but the automaker said the new engine is 5 percent less thirsty than the tri-turbo L6 it's replacing.
Nevertheless, the aim here was to one-up the outgoing tri-turbo L6 in terms of power, response, as well as high-revving abilities. BMW engineers have set out to achieve this using a pair of two high-pressure turbochargers and two low-pressure units.
Chief among the changes is the replacement of the hefty low-pressure turbo (used by the tri-turbo) with a pair of smaller "common" turbochargers - BMW explains the move allowed for a cost reduction without adding weight. Oh, and let's not forget the Marketing benefits.
While BMW used the Austrian powerplant convention to pull a Bugatti on us, the same event saw Audi talking about its new V8 TDI, so the oil-burning race is on.
However, with the diesel engine emission scandal having spread way past the VW Group, affecting the reputation of oil burners altogether, we doubt BMW is rushing to bring the new quad-turbo to the US.
The three-liter L6 allows the driver to control 394 hp (400 PS), delivered between 4,000 and 4,400 rpm, while the maximum torque sits at 561 lb-ft (760.6 Nm), offered between 2,000 and 3,000 rpm.
Now, before any die-hard diesel fan points out the respectable maximum twist figure could be even more impressive, BMW explains the peak torque was limited by the ZF 8HP tranny.
As for the real-world performance, so far we only know what the unit can do for the 750d xDrive, as it allows the lavish sedan to complete the 0 to 60 mph (96 km/h) sprint in 4.5 seconds, while having to face the good old 155 mph (250 km/h) electronic speed limiter.
So far, we don't have too many efficiency figures, but the automaker said the new engine is 5 percent less thirsty than the tri-turbo L6 it's replacing.
Nevertheless, the aim here was to one-up the outgoing tri-turbo L6 in terms of power, response, as well as high-revving abilities. BMW engineers have set out to achieve this using a pair of two high-pressure turbochargers and two low-pressure units.
Chief among the changes is the replacement of the hefty low-pressure turbo (used by the tri-turbo) with a pair of smaller "common" turbochargers - BMW explains the move allowed for a cost reduction without adding weight. Oh, and let's not forget the Marketing benefits.
While BMW used the Austrian powerplant convention to pull a Bugatti on us, the same event saw Audi talking about its new V8 TDI, so the oil-burning race is on.
However, with the diesel engine emission scandal having spread way past the VW Group, affecting the reputation of oil burners altogether, we doubt BMW is rushing to bring the new quad-turbo to the US.
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