Four doors. 500 horsepower. Twin turbos. This is not your average luxury sedan.Meet the 2010 Porsche Panamera Turbo Sedan 4D, a machine that takes the comfort and practicality of a four-door luxury car and injects it with the heart of a Porsche performance car. The Panamera Turbo was built to be fast, aggressive, luxurious, and completely unapologetic about what it is.Under the hood sits a 4.8L twin-turbocharged V8 producing 500 horsepower and 516 lb-ft of torque. Put your foot down and this big luxury sedan moves with the urgency of something much smaller. Porsche paired that power with its 7-speed PDK dual-clutch transmission and all-wheel-drive system, giving the Panamera Turbo brutally quick shifts and the traction needed to put that V8 power to the pavement.And the numbers speak for themselves. When new, Porsche rated the Panamera Turbo at 0-60 mph in around 4 seconds, putting this four-door luxury sedan firmly into serious performance territory. This is a car built to devour highway on-ramps and remind you very quickly why there's a Porsche badge on the hood.But raw power is only half the story.The Panamera Turbo was engineered to handle like a Porsche. Its low, wide stance, sophisticated suspension, massive braking capability, and performance-focused chassis give it the confidence to do far more than simply accelerate in a straight line. It's a grand touring sedan with genuine sports-car DNA running through it.Then you step inside and the personality changes completely.p style=caret-color:000;color:000;font-style:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-indent:0;text-transform:none;white-space:normal;widows:2;word-spacing:0;-webkit-text-stroke-width:0;text-decorati