Car and Driver's rankings are based on two major sources: one is the data obtained from a large number of instrument tests on hundreds of models every year, and the other is the subjective feelings formed by our professional editors in actual driving. When ranking size luxury cars, we referred to approximately 200 data points, covering acceleration, handling, comfort, storage space, fuel economy, cost performance and driving pleasure. We attach great importance to the rigour of rankings because our goal is to give you a comprehensive understanding of the models you are interested in.