When Bugatti’s recently revealed Chiron hits the road it won’t be the only car brandishing four turbochargers.

That’s because BMW has announced a new super-3.0-litre diesel six, designed to replace the current triple-turbo N57S engine (pictured) that serves duty in the M550d and X6/X5 M50d models, will feature quad-turbo technology when it debuts in an upcoming 7-Series variant.

BMW-550d -front

With a specific output of 96.7kW per litre – a massive achievement for a diesel unit— it shades the N57’s outputs by 13kW and 21Nm, with its torque ultimately limited by the BMW’s ZF 8-speed transmission. It’s also expected to improve the engine’s response and fuel economy – the latter said to be slashed by five per cent.

BMW 750d rear

The B57 Top is expected to make its debut in the upcoming 750d xDrive before making its way into the nose of other M Performance diesels in the 5-Series, X5, X6, model ranges.