Two SUVs with some similarities, but otherwise different in most aspects such as the powertrain, starting price, horsepower, fuel economy, market segment, ground shadow size, and height. First of all, the 2015 Jeep Grand Cherokee has a more powerful engine and gets 10.5 mpg less than the 2016 BMW X3 Diesel. Also, there is a notable difference in the starting price of the 2015 Grand Cherokee, which is $12,455 less than the base MSRP of the 2016 X3 Diesel. In addition, the X3 Diesel is both slightly smaller and shorter than the Grand Cherokee. Among similarities are the body structure and maximum occupancy.