The Porsche Panamera competes against German luxury sedan royalty, with this full-size four-door 'coupe' taking on rivals from BMW and Mercedes-Benz. The Panamera stretches the looks of the classic 911 across a four-door platform, and while it might not be a lightweight it offers impressive acceleration, with naturally-aspirated, hybrid, and turbocharged models providing up to 520 horsepower. All-wheel drive, a seven-speed dual-clutch automated transmission, and a new long-wheelbase model are also available.