It ‘s the dawn of a new age at M. Or depending on how you look at it, a return to form (a la the M535i). Either way these new diesels touched by the magic of M look and sounds fantastic. Perhaps more importantly, the numbers look extraordinary; 381 hp and 546 lb-ft from a triple turbocharged inline six. Power is driven through an eight speed automatic gearbox and put down to the pavement via a revised xDrive system. The results as impressive as expected – 0-60 should fall somewhere in the mid four second range.
But all that aside, it ‘s the engine ‘s technology that has our mouths watering.
This is BMW’s first application of a triple turbo set-up and one of the first in the automotive industry. The size, arrangement and interplay of the turbos are designed to guarantee maximum power across the power range. The system comprises two smaller and one larger turbo. According to the driving situation, the low moment of inertia of the small turbochargers is exploited to the full to deliver razor-sharp responses, while the link-up with the large turbo is maximised to generate as much charge pressure as possible.