You wouldn’t know it at first glance – or even a second or third glance – but the BMW 5 Series receives styling updates for the 2008 model year. What isn’t so subtle is what’s under the hood. Both six cylinder engines in the 5 Series are updated with more power and refinement. The 528i replaces the 525i and benefits from an improved 3.0-liter inline-six with 230 horsepower, 15 more than last year. The 530i is replaced with the 535i, powered by the twin-turbo direct injection engine from the 335i for a stout 300 hp.