Quote:
Originally Posted by samsfisher
Hi Folks -
I am looking to buy a CPO / Used X7 and considering either 2019 X7 xdrive50i or 2020 X7 m50i. There is roughly ~10K difference between the two for similarly spec'd cars (M Sports package, Dynamic handling package, M Sport differential etc). I am trying to understand what's the value add of M50i. From what i can gather M50i has sports+ mode with launch control which is not available in xdrive50i. Are there any other adds that M50i has? Do you know if there is any difference in driving characteristics between the two.
Thanks
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While the M50i's engine is the same basic twin-turbo 4.4-liter V-8 as the 50i, the two are different enough to gain their own engine codes.
The 50i uses the N63B44M3 unit, while the M50i uses the N63B44T3, the same version of the engine that's found in the M850i and the refreshed 7-series.
M50i models make 523 horsepower and 553 lb-ft of torque, increases of 67 horsepower and 74 lb-ft of torque over the 50i. Enhancements to the engine relative to the 50i's unit include a block made of a new aluminum alloy, a viscous damper on the crankshaft, stronger pistons and piston rings, and an iron coating on the cylinder walls. X7 M50i will hit 60 mph in 4.5 seconds, 0.7 seconds quicker than the 50i version.
The eight-speed automatic has been tweaked and now has a launch-control function, and the M division tuned the suspension. X7 M50i comes standard with M Sport exhaust system, bigger M Sport brakes, and an electronically controlled rear differential - whereas on the 50i, you had to option the ZMP M Sport package and ZDH Dynamic Handling Package.
To visually set the M50i apart from 50i models that are equipped with the optional M Sport bodykit, they get unique Cerium Grey exterior trim on components like the front grille, fender vents, and wheels (if optioned)
Is the 2019 50i equipped with ZMP and ZDH? If yes then the value add is the newer N63B44T3 engine and upgraded transmission.
The 50i was a hold-over engine until the M50i was released.