Have read a comprehensive road test on the new A4 2.0 TDi up against the equivalent E90/Merc C class & Cadillac. BMW came out well on top pleased to say, so after all this hype on the new Audi, this full report still puts the beemer ahead on all driving aspects and overall ownership.
Interesting that the beemer produces very good torque figures through the gears in the important overtaking speeds of 50-70 mph.