From Porsche press: The Boxster continues in '08 with a 245-horsepower 2.7-liter, horizontally opposed six-cylinder with Porsche’s VarioCam Plus system. This valve control technology adjusts both intake valve lift and timing for better performance and fuel efficiency. The engine develops 201 lb.-ft. of torque and can be mated to either a five- or six-speed manual gearbox or a five-speed Tiptronic S. The Boxster accelerates to 60 mph in 5.8 seconds.
Besides delivering more power than in their original iterations, the Boxster is now certified as an Ultra Low Emissions Vehicle (ULEV), while the Boxster S earns a LEV-II (Low Emissions Vehicles, category two) rating. And with EPA fuel economy ratings of 20 mpg in the city and 29 mpg highway for the five-speed Boxster, and 18 mpg city and 26 mpg highway for the Boxster S with manual gearbox, both cars deliver Porsche performance without the stigma of a gas guzzler penalty.
The mid-engine design allows for a versatile trunk aft the engine. In 2007, Porsche's engineers repositioned the service tray, giving that trunk a more symmetrical shape. This modification smoothed the right trunk wall. Though trunk capacity is essentially unchanged at 4.6 cu.-ft. (130 liters), the space is more usable. The rear trunk is complemented by the front luggage compartment which has a 5.3 cu.-ft. (150 liter) capacity.