It's no surprise that the 2009 Audi A5 is an exceptionally confident handler, but equal credit for that prowess is due to a ultra-rigid platform design that features additional mass-reducing aluminum-intensive suspension components and a more pronounced engine setback that creates better overall balance. The net result is that the A5 feels impressively neutral when being hustled through corners, turning in crisply and tracking cleanly.TheA5's standard full-time quattro system is designed to optimize the power balance to all four tires all of the time. While normally apportioning motive force in a 40/60 percent front-to-rear split via a Torsen locking center differential, it can vary those percentages between 65/35 and 15/85 as traction conditions warrant. The result is you have the most advanced and capable drive line available today.