Audi S4 Project Vehicles Articles

Part 5: Final Touches

It was a very challenging task to take one of Audi's most accomplished cars, the S4, and improve its performance without compromising the essential "rightness" of the car. We consider our efforts a success. more

Project Audi S4

In Part 3, Project S4 acquired a substantial power upgrade to its 2.7-liter turbocharged V6. APR stepped in with its Stage 2-plus setup, increasing boost from the stock 7 psi to an astonishing 1.0 bar--just over 14.5 psi. On my first test drive with the 100-oc more

Project Audi: Part 3

Buying a factory-turbocharged performance car is often done for one reason--"tuneability." Thousands of dollars can be spent increasing a normally aspirated engine's output by a nominal amount, but a turbocharged car's power can be effectively upgraded by a si more

Project Audi S4 Part 2: Suspension

From the factory, the Audi S4 is well balanced. Standard features include large brakes with twin-piston calipers, a powerful twin-turbocharged V6 motor, and a street suspension to harmonize the S4's overall performance. The stock suspension is soft enough for more

Project Audi S4 Part 1: Wheels, Tires and Brakes

Notice a new project car on this month's cover? Did you think we would overlook modifying what is possibly the most "tuneable" European car right out of the box? When the Audi S4 reached U.S. soil in 2000, it was an instant winner. The relatively affordable Eu more

Project Audi S4 - Part 3

Part 3:The Joy Of Turbo Charging more

Project Audi S4 - Suspension

Part 2: Suspension It's All About Balance more