Spied: Audi S4

Spy photographers have spotted the next-generation Audi S4 while out for testing. Based on the all-new A4 that made its debut at the Frankfurt Motor Show, the new S4 promises even more performance than the previous model. While the front bumper remains unchanged -- a slightly different design is expected soon -- a few subtle changes can be seen. Audi's signature chrome side mirrors found on S models are also absent.

Compared to the A4, the new S4 has bigger wheels and brakes, new side skirts and quad-exhaust. Powering the S4 will be a 354 horsepower V8. Mechanically, the S4 is expected to be identical to the S5.

September 24, 2007