The Land Rover Defender V8 answers a question that nobody strictly needed to ask: what happens when you put a supercharged 5.0-liter V8 producing 518 horsepower into a car that can also ford rivers, climb gradients that defeat other off-road vehicles, and carry a family of five across terrain that requires disconnecting the front anti-roll bar and deploying a low-range transfer case? The answer is that it works, and it works in a way that is not obviously coherent but is undeniably entertaining.