acceleration of 0.96g. The Panamera, S, Hybrid and Diesel models are rear-wheel drive, while the Panamera 4, 4S, and GTS have the same four-wheel drive system as the Turbo and Turbo S, called Porsche Traction Management (PTM). The Panamera featured Adaptive air suspension, the Porsche Dynamic Chassis Control (PDCC), active anti-roll bars and the Porsche Active Suspension Management (PASM). Engines Transmissions The newly introduced ZF 7-speed PDK dual clutch transmission was standard on the Panamera 4, 4S and Turbo models. The addition of the optional sport chrono package provided faster acceleration times. The S Hybrid and Diesel models had an Aisin-supplied eight-speed automatic transmission called the Tiptronic S. In some markets between 2009 and 2013 Porsche offered 6-speed manual transmission for the V6 N/A and V8 N/A, all with rear wheel drive. Global production with the 6-speed manual was only 50 with V6 and 96 with V8. Panamera Turbo S The engine of the Panamera Turbo S features larger turbochargers than the standard Panamera Turbo's 4.8-litre V8, as well as high-pressure fuel injection, and aluminium-alloy pistons. The piston rings are coated in a low-friction surface to help eke out even more performance. The Panamera Turbo S accelerates to in 3.3 seconds with launch control engaged. Roll-on acceleration should be more impressive, changes to the PDK (Porsche Doppelkupplung) gearbox allow for faster gearshifts, and the alleged 27.7mpg fuel economy is no worse than the less powerful Panamera Turbo. Drag Coefficient: 0.30 : 3.3 seconds : 7.2 seconds 1/4 mile: 11.5 seconds at Braking to : Panamera S Hybrid In 2008, Porsche AG announced the development of a parallel hybrid system for the Panamera, and in February 2011, Porsche unveiled the Panamera S Hybrid. Using the same drivetrain seen in the Cayenne S Hybrid—an Audi-sourced supercharged 3.0-litre V6 engine producing along with an electric motor rated at , as well as the Cayenne's 8-speed Tiptronic S transmission—the Panamera S Hybrid could accelerate from 0– in 6.0 seconds. The Panamera S Hybrid produced only 193 grams of carbon dioxide per kilometre, rendering it the most environment friendly car in the then entire Porsche model range, while still maintaining a top speed of . Deliveries began in the United States in 2011, and cumulative sales reached 684 units through March 2013. The U.S. Environmental Protection Agency (EPA) rated the fuel economy for the 2013/2012 model year Panamera Hybrid at for city driving, for highway,