The Porsche Cayenne begged many to question whether a sport utility vehicle would properly fit into the sports car company's brand portfolio. With the addition of a second generation Cayenne for 2008, there's an acceptance in the all-wheel drive four-door. An updated sporty design, direct-injected engines and available Porsche Dynamic Chassis Control are just a few upgrades to the new premium model. Several new variants of the Porsche 911 are making debuts for the 2008 model year. Introducing a new 911 GT3 last year, drivers seeking a race-inspired version of the rear-engined sports car are provided with the 911 GT3 RS for 2008. The 2008 Porsche 911 GT3 RS model features a wider rear body, increased use of carbon fiber components and a single-mass flywheel. Equipped with a 530-horsepower, twin-turbocharged six-cylinder engine, the all-new iteration of the Porsche 911 GT2 can soar to more than 200 miles per hour. The final addition to the 911 lineups for 2008 is Porsche 911 Turbo in the form of a drop-top convertible.