* 2.0T: This is a 2.0-liter turbocharged four-cylinder engine that produces 200 horsepower.
* 3.2 FSI: This is a 3.2-liter naturally aspirated V6 engine that produces 265 horsepower.
* 3.2 quattro: This is a 3.2-liter naturally aspirated V6 engine that produces 265 horsepower and has Audi's quattro all-wheel drive system.
* S4: This is a higher-performance version of the A4 that comes with a 4.2-liter naturally aspirated V8 engine that produces 340 horsepower.
Please tell me which trim level you're interested in, and I can provide you with the exact engine size and specifications.