The BMW M550i xDrive just isn’t what we might contact a slowpoke. With its 4.4-liter, TwinPower Turbo V8 motor, it packs really a meaty punch. The twin-turbo eight-banger places out 523 horsepower and (390 kilowatts) and 553 pound-feet (750 Newton-meters) of torque. With an engine that places out even much more ability than the V10 E60 M5, it can be a genuinely amazing powertrain.
Nevertheless, Car or truck and Driver was not that amazed when they analyzed the model in its instrumented tests. The to 60 mph claim was not satisfied with a time of 4.1 seconds. Even though it is not what we’d get in touch with slow, it is not the sub-4 second time the manufacturer was proclaiming. The magazine resolved to retest the auto and loaded it up with bigger-octane gasoline.
The boosted executive sedan did a tiny little bit greater than the original exam. It did the to 60 mph run in 3.9 seconds. Car and Driver mentioned that it can continue to do even superior given that the a great deal-heaver X5 M Level of competition can pull pretty much the similar effects. The slower than envisioned acceleration instances have caught BMW’s awareness, and the automaker’s resolution was to give it an more than the air (OTA) update.
So did the software package update do the trick for the M550i? The remedy is indeed, and it can be a lot faster than ahead of. The journal re-tested the sedan for a third time and eventually obtained the benefits they were being expecting. The to 60 mph time dropped from 3.9 seconds to just 3.5 seconds. It also crossed the quarter-mile in 11.8 seconds at 119 mph (191.5 km/h). That would make it just a few tenths slower than the regular M5.
But what prompted the slower operates in the pre-update types? Nicely, BMW has an explanaition for that. As it turned out, there was a glitch that brought about the steadiness command to interfere. The miscommunication between the engine management unit and steadiness handle module prompted the latter to slash electrical power. BMW provides that a very similar OTA update is readily available for the 540i xDrive as very well.
Now that all of its 523 horsepower up and running, all those thinking of an M5 should really probably get the M550i out for a spin first. With a base selling price of $76,800, it really is substantially extra cost-effective than its far more hardcore (and stiffer-riding) stablemate.