Porsche's diesel-powered Panamera may have impressed with its economy, but it's always been the weakest performance link in the range.
That's set to change with the updated Panamera Diesel, which gets an upgraded 3-litre V6 turbodiesel engine that's now good for 221kW and 650Nm - that's 37kW and 100Nm more than before!
As a result, the 0-100km/h sprint time is reduced from 6.8 seconds to six on the dot, while the top speed rises from 244km/h to 259km/h.
The fuel consumption penalty is marginal, according to Porsche, with the NEDC combined figure rising from 6.3 l/100km/h to 6.4.
Although retaining the same engine dimensions as its predecessor, engineers reworked the crankshaft drive and pistons and the turbocharger is now water cooled and provides greater air flow and a higher boost pressure of three bar.
The eight-speed Tiptronic S transmission has also been retuned, as has the chassis.
The big news here is that Porsche's controlled rear-axle differential lock with Porsche Torque Vectoring Plus (PTV+) - previously only offered on petrol models - is now fitted to the Diesel too.
The system improves agility and steering precision at lower speeds and delivers better stability at high speeds and when powering out of corners.
The new Panamera Diesel will make its first appearance at the Frankfurt Motor Show on 10 September before being rolled out to international markets from January next year.