Porsche Panamera review - MPG, CO2 and running costs

As part of the Panamera’s engine line-up, all V8 variants get cylinder deactivation technology that will shut down some of the unit’s injectors on the move when maximum power isn’t needed, helping to save fuel. 

Unsurprisingly, the 4 E-Hybrid is the most efficient Panamera on sale, with Porsche claiming up to 141.2mpg under WLTP testing and CO2 emissions between 45g/km and 57g/km. To realise this exceptional economy figure, you'll need to keep the battery topped-up and regularly exploit the 30-35 miles of all-electric drive.

The more powerful 4S E-Hybrid and Turbo S E-Hybrid still manage to return decent overall economy (128.4mpg and 104.6mpg, respectively) with just a slight drop in pure electric drive capability.

Move up through the increasingly powerful petrol models and you see obvious reductions in efficiency and higher emissions. The Panamera 4 achieves up to 27.2mpg, with CO2 emissions from 235g/km, while the GTS delivers 23.3mpg and a significant jump to 275g/km of CO2.

Predictably, the efficiency of the 4.0-litre V8 Turbo S isn't quite as good, with 22.1mpg and CO2 emissions of 289g/km. As ever, you may not match any of these numbers if you choose to exploit the Panamera's full performance.

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Insurance groups 

Premium cars like Porsches generally aren’t cheap to insure, and the new Panamera is no different. Despite some sophisticated safety technology, all cars sit in group 50. 

Depreciation

The Panamera 4 is the best performer in the range in terms of residual values, holding onto around 67 per cent of its value over a typical ownership period of three years and 36,000 miles. The 4S is a little behind on 60 per cent, while the 4 E-Hybrid sits in the middle on 63 per cent over the same three-year period.

There's quite a significant drop in value if you opt for the Turbo S and Turbo S E-Hybrid models, which are expected to retain around 49 per cent of their original list price over the same three-year period.