After being "confirmed
" earlier this year, rumors of BMW's 5-Series diesel with M Division tuning--but not M5 badges--are sprouting fresh roots. This time around, the talk comes with a name: M550dX.
Astute observers of BMW's nomenclature will note that that's not how cars are named here in the U.S. If it were to be translated along familial lines, given its M-derivation, it would probably come out something like: 5-Series M Sedan xDrive50d. Yes, that's an awkward mouthful.
What's not awkward, however, is the rumored 381 horsepower, 517 pound-feet of torque triple-turbo 3.0-liter diesel engine, per Driving-Fun
. Three turbos? Yes, just like rumored for the next M3
, and likely leveraging the electric turbocharger
leaked in patent drawings earlier this month as the third, in addition to two standard turbos.
With all-wheel drive also on the table for the 5-Series M diesel, it's sure to be a quick ride--if it's real. Another if is whether such a vehicle would make it to the U.S.
Production of the new diesel not-an-M5 is said to start in March, 2012, however, so if it all pans out, we don't have long to wait to find out.