Meanwhile, the 5-Series gets a refreshed look for the 2008 model year with updated exterior styling, enhanced interior design and upgraded materials. In addition the 525i and 530i will become the 528i and 535i, respectively, and both get revised engines to match their new names. The 528i will have 230 horsepower, while the 535i gets BMW’s new turbocharged inline 6-cylinder engine producing 300 horsepower.