2018 Mazda CX-3: 12.4 Cubic Feet

Neither the Mazda3 nor the CX-3 are the most spacious options in their class. But you’d be surprised at how much room the hatchback has over the small SUV. The Mazda3 hatch has 20.2 cubic feet of rear cargo room behind the second row, while the CX-3 has a measly 12.4. With the rear seats folded flat, that number jumps up to 47.1 cubic feet for the 3, and 44.5 cubic feet for the CX-3.