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BMW Announces 750d Quad-Turbo Diesel, World's Most Powerful Diesel Six Photo:

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Tony O'Kane | May, 18 2016 | 1 Comment

Not content with hanging three turbos off the side of a diesel inline six (as seen in the X5 M50d and X6 M50d), BMW has upped the ante by attaching a fourth turbo to its ubiquitous 3.0 diesel six-cylinder to create what is says is the world’s most powerful six-cylinder diesel - and the BMW 750d will be the first model to get it.

With peak outputs of 294kW and 760Nm, the 750d xDrive’s quad-turbo diesel produces enough power and torque to rival many modern performance V8 engines, yet it consumes just 5.7 l/100km on the European test cycle in standard-wheelbase form.

Thanks to AdBlue injection, a diesel particulate filter and NOX storage catalytic converter, emissions are held to a 149g/km

Three of the four turbochargers are constantly in operation - two low-pressure and one high pressure turbo.

Under hard acceleration the two low-pressure turbos are bypassed to channel more exhaust gas through the high-pressure turbo and build boost quicker, while a second high-pressure turbo becomes active above 2500rpm.

As a result, a huge 450Nm of torque is available from just 1000rpm. The full 760Nm whack is available from 2000-3000rpm and peak power occurs at 4400rpm.

All-wheel drive and an eight-speed auto are standard-issue on the 750d and long-wheelbase 750Ld, however if you were keen on the idea of a high-powered diesel limo of your own, best you don't hold your breath: BMW Australia tells us the 750d is not coming to our shores.

We may, however, see its engine in a future update of the X5 M50d and X6 M50d. Watch this space.

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