BMW’s Incredible Quad-Turbo 750d Serves Up A Massive 400bhp And 560lb ft
Remember that astonishing quad-turbo BMW diesel engine we spoke about a couple of weeks ago? Well, here’s what it’s being fitted to: the 750d and 750Ld xDrive.
Along with the announcement of the car, we’ve now had confirmation of the power and torque outputs: 394bhp and 560lb ft, which matches claims made in a prior report from Bimmerpost. According to BMW, that makes this ‘B57’ 3.0-litre engine the world’s most powerful six-cylinder diesel.
As a reminder, the B57’s triple-turbo ‘N57S’ predecessor used a small turbocharger for low revs, with a larger one kicking in at the mid-range and another little blower for high engine speeds. In the B57, that bigger turbo is replaced with two smaller turbos. The resulting 394bhp output gives the 750d a 0-62mph time of 4.6 seconds, while the long wheelbase version is a tenth slower owing to the extra weight.
Where things get really interesting is torque deployment. The B57 makes 332lb ft of twist at just 1000rpm, with the full 560lb ft felt from 2000-3000rpm. It’d be good for even more than that, if the eight-speed, ZF-sourced gearbox could actually take any further torque without being in danger of going pop.
Speaking to a BMW UK representative today, we were told that the 750d xDrive unfortunately won’t be making it to our shores. BMW wasn’t able to confirm whether or not the B57 will make an appearance in another of its cars, but hinted that it’s likely. So, it’s reasonable to speculate that we’ll get a successor to the mighty M550d in the near future.
Comments
heavy breathing
If it’s a quad turbo…whys it only pushing 400 horse?
Because not all 4 turbos work at the same time. You’ll have small ones for low down revs to minimise lag, which will shut off at higher revs.
Because the gearbox can’t handle the amount of torque the engine can produce. Also, it’s a diesel.
BMW can make this amazing enige. Can´t they try to make their own gearbox that can handel it?
ZF has been making transmissions for BMWs (at least) since the 90’s. E.g. the 5-speed manual in an E36 M3 is made by ZF. The company has also made gearboxes for Audis, Porsches, Alfas etc…
Does it also come with free 10 year warranty because if BMWs of the past are anything to go by, it might come in handy…
is it 560lb/ft or 760 lb/ft?
There is an error in this article. Engine has 760Nm, not 760 lb-ft
400hp out of a quad turbo v6 seems a little low i know its diesel but come on i bet you can squeeze so much more from it
Its because of the gearbox not being able to handle more, so they probably can go a lot higher but they would lose the reliability as the engine would rip the drivetrain apart
*straight 6 not v6
I want delayed blow off valves in order.
BWAAAAAHH
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PricopAlexandru
Fuuuuuudge