Standard Engine 2.5L 184 hp I6 3.0L 225 hp I6
Horsepower 184 @ 6000 RPM 225 @ 5900 RPM
Torque (lb-ft) 175 @ 3500 RPM 214 @ 3500 RPM
i drive a 330ci, so i pick the 3.0L, this is a totally biased opinion as i have no clue as to which one is better or any idea what is better for you for your needs. in this case and some others bigger=moar power!!!