I know it takes it out of eco mode for one thing, my wife's Grand Cherokee has sport mode and I notice it did that on hers too. not sure what else it does though.
On my 2017 Challenger T/A, depending on how the setup page is set it can do several things. Turn off eco mode, change steering firmness, change shift points, turn off traction control and change throttle response. I may have missed something as it has been a while since I read the manual.
I have a 13' Dodge Challenger SXT Plus with Sport Mode. Used it once and I liked it very much. Seems to stiffen the ride while providing a more suitable racing mode. You must know cars to feel the difference. However, as "kysrt8" said, 'It takes it out of "eco mode", thereby using more gas.
I agree about the racing mode. It feels more responsive with sharper more crisp acceleration. I have activated the sport mode for brief periods then switching back to regular mode to see the difference. The steering feels different as well. Overall a very nice feel that adds that much more to this great SXT. Speaking of "ECO mode" I am surprised that I have been able to hit 23MPG as a daily commute car to and from work in the city. Cant wait to see what it will do on long trips. I compare this to my last vehicle, a 2010 Altima 4cyl that got 27MPG in the same driving conditions.
Works well with the SXT Plus. I'll take the D.O.H.C. over a Hemi, regardless of horsepower. Remember, you have MDS; live with it!
These links should provide a synopsis of 'MDS'. In laymen terms, it simply shuts off 4 cylinders when not needed "Supposedly to conserve gas". Not a fan of that function. http://media.fcanorthamerica.com/newsrelease.do?id=8414&mid= https://www.challengerforum.com/threads/pros-cons-of-turning-mds-off.1144/ https://en.wikipedia.org/wiki/Multi-Displacement_System *The 3.6 Pentastar does not incorporate this feature.