I am a proud owner of the Range Rover Sport. It out-muscles the LR4 in terms of horsepower meaning better performance. The fuel economy of the LR4 is 19 to 27 kmpg as compared to 20 to 28 mpg of the Sport making the Sport better in this respect. The LR4 is no match in terms of luxury and the off road capabilities. Go for the Sport. It is a gorgeous and sporty car. Even if it means saving up more, the Range Rover Sport is worth every penny.