BMW is currently in the midst of developing a brand new quad-turbocharged diesel engine to replace its current tri-turbo system. The new engine will reportedly debut on the 2016 BMW 750d and is tipped to pump out 395 hp.
The engine will be labelled either the B57 TOP or B57S and there’s a possibility the engine will use three traditional turbochargers alongside an electric turbo. Whatever the case may be, it will displace 3.0-litres and be an inline-six, just like the current tri-turbo engine which delivers 381 hp and 546 lb-ft of torque.
When launched, the new quad-turbo will be coupled exclusively with the German marque’s xDrive all-wheel drive system.
After debuting on the 750d, a number of other 50d branded BMW models are expected to utilise the same engine.