Porsche expands its number of hybrids by 200 percent. Joining the Cayenne S Hybrid SUV is the 2011 Panamera S Hybrid, dubbed by its makers as the most fuel-efficient Porsche of all time. This sedan/hatch won’t make it to the States until later this year, so the EPA doesn’t have any figures on it yet. But the claimed 6.8 liters per 100 kilometers consumption converts to 34.6 mpg, so that’s a ballpark. It’s the same hybrid hardware as in the Cayenne version: a 333-hp 3.0-liter V6 (sourced from Audi) and a 47-hp electric motor, plus nickel-metal-hydride batteries. A rear-drive-only modelthe Panamera S Hybridgoes on sale in the States later this year, starting at $95,975, but with a lot of standard equipment.