Test Drive Unlimited certainly is living up to its name--the "Test Drive" part at least. Atari today announced that a second free trial of the Xbox 360 racer will be headed to Xbox Live Marketplace tomorrow. The new demo will include three new cars--the Ferrari F430, the Ford Mustang GT, and the AC Cobra--as well as a Kawasaki Ninja ZX-10R motorcycle.

Along with the new wheels comes new avenues to burn rubber on. The demo will feature four new offline challenges and two new online challenges that support up to eight racers, or drivers can challenge others they meet on the road or simply cruise the coasts of an accurately replicated Oahu, Hawaii. Other basic gameplay improvements, such as improved online performance and car handling and sharper graphics, have also been added.