The 2008 Mountaineer does not need any upgrades so far as the powertrain is concerned. The V8 engine has a capacity of 4.6 liters and delivers a high horsepower of 292hp, while the V6 has a lower capacity of 4.0 liters and a horsepower output of 210hp. The former comes with a six-speed and the latter with a five-speed transmission, both being automatic.
The 2008 Mercury Mountaineer continues to make use of the AdvanceTrac system in its anti-skid mechanism. The voice command system is integrated not only into the entertainment system, but also the communications system as well.