The 2013 Frankfurt Motor Show is where Porsche will unveil its refreshed Panamera Diesel, having already taken the wraps off other Panamera variants at the Shanghai Auto Show back in April. The diesel sports the same surface and interior enhancements as its siblings, as well as some serious changes to the powertrain. Under the hood, the Audi-sourced 3.0-liter V6 diesel has been lifted to 296 hp and 479 lb-ft of torque, up from 247 hp and 405 lb-ft.

The RWD Panamera's eight-speed automatic box has been revised and Porsche's torque vectoring system added. As a result, 0-62 mph drops by 0.8 to 6.0 seconds, while top speed is up from 152 to 161 mph. Counterintuitively, the engineering wizards at Porsche has also managed to improve economy to 36.7 mpg and reduce CO2 emissions to 169 g/ km. Due out in January, the refreshed Panamera Diesel will be priced from 85,300 Euros in Germany.