Compare images of 2018 BMW X3 M40i and 2018 BMW X4 M40i by choosing the desired model and trim and then selecting the comparison image.
What we have here are two SUVs from BMW with some differences, such as the cargo volume and fuel economy. First of all, you get 2 more mpg with the 2018 BMW X4 M40i than with the 2018 BMW X3 M40i. And finally, the 2018 X3 M40i has a 11 ft² larger cargo area behind second-row seats. Among similarities are the body structure, market segment, starting price, horsepower, ground shadow size, height, and maximum occupancy.