The 2015 Ford Explorer and Toyota 4Runner are among the most popular SUVs on the road. The Explorer is a full-size, three-row crossover SUV designed to provide spacious seating, strong engines, and modern features. The 4Runner is a midsize SUV with optional third-row seating, a dependable V6 engine, and impressive cargo space. If you're having trouble deciding between the two, read our four-category comparison.