The Land Rover Discovery competes with mid-sized luxury SUV's like the BMW X5 and the Audi Q7. With dimensions that are slightly longer than the outgoing LR4, the Discovery offers plenty of space, while its trademark roofline provides extra headroom for third-row occupants. Unlike other SUV's in this class, the Discovery has real off-road chops, with enough ground clearance to tackle most obstacles and standard 4-wheel drive. It can even wade through up to 35 inches of water.