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Costs and real consumption: Porsche 718 Cayman GTS 4.0

Porsche 718 Cayman GTS 4.0 for 85,051 euros. We show what the car costs in everyday use and how much fuel it consumes.

The Porsche 718 Cayman GTS 4.0 presses its rear wheels onto the asphalt with the weight of its low-lying six-cylinder boxer, logs the analog launch-controlled speed needle on the red five and clicks off just as quickly as you do foot off the clutch pedal. We show what the Cayman costs and how much fuel the car uses on a daily basis.

Our test consumption

The Porsche 718 Cayman GTS 4.0 comes with a 400 hp, 4-liter six-cylinder engine that consumes 10.9 liters per 100 kilometers according to the WLTP standard. In our test, the car consumed 10.8 liters, which means fuel costs of 23.22 euros for this route. The Eco consumption value is significantly lower at 8.5 liters - the costs here are 18.27 euros. Sports drivers chase an average of 13.8 liters through the combustion chambers - makes 29.67 euros. The fuel costs are calculated using the daily updated fuel price on our partner portal mehr-tanken.de (as of May 25, 2022, 2.15 euros per liter Super Plus).

Monthly maintenance costs

The annual vehicle tax for the Porsche 718 Cayman GTS 4.0 is 508 euros. According to Allianz Direct* , liability insurance costs 308 euros in the same period. Partial casco insurance costs 176 euros per year, and fully comprehensive insurance covers 1,131 euros. If you drive 15,000 kilometers a year, you have to budget for monthly costs of 517 euros. At 30,000 kilometers, the amount increases to 961 euros. Added to this is the loss of value.

How to test

The auto motor und sport test consumption consists of three differently weighted consumption runs. So-called “commuter consumption” accounts for 70 percent. This is a journey from home to work, which averages 21 kilometers. A particularly economical, approx. 275-kilometre-long eco-lap is included in the rating with 15 percent. The remaining 15 percent is accounted for by the sports driver lap. The length is roughly the same as the eco lap, but the route includes a larger proportion of motorway and thus higher speeds on average. The calculation basis for the fuel costs is always the price information of the portal "more refueling" from the day the article was created.

The monthly maintenance costs include maintenance, wear part costs and vehicle taxes assuming an annual mileage of 15,000 and 30,000 kilometers without loss of value. The calculation is based on the test consumption, a three-year holding period, no-claims class SF12 for liability and fully comprehensive insurance with Allianz Direct, including discounts for garage parkers and the restriction to certain drivers (accident-free/15,000 km per year, resident in the postcode area 70174, not under 21, partner drivers older than 25 years).


The Porsche 718 Cayman GTS 4.0 with 400 hp 4-liter six-cylinder costs at least 85,051 euros and consumes an average of 10.8 liters, which means fuel costs of 23.22 euros over 100 kilometers. With an annual mileage of 15,000 kilometers, the monthly maintenance costs are 517 euros. If the mileage increases to 30,000 kilometers, the sum increases to 961 euros.

* These links lead to providers from whom auto motor und sport receives a commission. As a reader, you benefit from a 15-euro voucher upon completion.


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