The new diesel powered Panamera will make its debut at the Frankfurt Motor Show next week. The 3.0-liter V6 unit, which Porsche says is completely new, offers a 20 percent increase in performance compared to the previous engine, which developed 247hp (250 PS). Peak torque is also boosted by 100 Nm (74 lb-ft) to 650 Nm (479 lb-ft), and is available between 1,750 and 2,500 rpm.

0 to 100km/h is now covered in 6 seconds, while top speed is rated at 259km/h.

Fuel economy is slightly affected with the Panamera Diesel averaging 6.4 1/100 km compared to 6.3 1/100km with the previous engine.

The Panamera Diesel will be available from January 2014.