Ulrich Bez has thrown down the gauntlet to his former employer Porsche with this gorgeous four door concept, the Aston Martin Rapide. The rakish Rapide takes aim at Porsche's planned front engine, V-8-powered Panamera four-door, due 2009. Because it's based on the versatile VH architecture that underpins the current DB9 and Vantage, it could beat its Stuttgart rival into production by at least a year.