We were quite impressed with BMW’s triple-turbocharged diesel engine found in the X5 and X6 models, but BMW still thought it was necessary to up the forced induction by adding yet another turbocharger into the mix. This revised powertrain is set to be used as a flagship engine for the 750d xDrive as well the X5 M50d, X6 M60d and next generation M550d xDrive.
The end result is 294 kW from 4 000 – 4 400 r/min and 760 N.m of torque that can be accessed from 2 000 – 3 000 r/min. BMW claims that it could deliver even more torque but the eight-speed ZF transmission wouldn’t be able to handle it. BMW has replaced the large low-pressure turbocharger with two smaller ones to smooth out the induction process while maintaining the same weight.
As a result, the new engine will see the 750d accelerate from 0-100 km/h in 4,5 seconds (0,6 seconds shy of the V12 760Li xDrive) until it reaches its limited top speed of 250 km/h. Despite having an extra turbo the engineers are certain that this will be more economical than the one it replaces.
