Our two test drivers want to know if the new Mazda 6 can outperform the Audi A4. The gasoline-powered Mazda with 120 horsepower is available for €22,500 in Germany. The top engine generates 170 horsepower. Meanwhile, the Audi A4 with a 120 horsepower engine sells for €26,000, but the carmaker offers a much more robust version with 265 ponies under the hood. The Audi is definitely the sportier of the two rivals. The top-of-the-line A4 sells for €45,000.