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Porsche Boxster Roadster (2004-2011) running costs and reliability

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Running costs rating: 3.5 out of 53.5

Written by CJ Hubbard Published: 28 September 2024

Miles per pound (mpp)

Reliable fuel consumption data for comparison purposes is not available for this model.

What is miles per pound?

Fuel economy

A more stringent standard for fuel economy (WLTP) was introduced from September 2017, and this model was not required to undergo that test. Its fuel economy measured under the previous test system was 25 - 31 mpg. However these figures are less likely to be achievable in real world driving and so should never be compared to another car's mpg which was measured under the newer, more realistic WLTP system.

View mpg & specs for any version

As it’s a Porsche don’t expect it to be cheap in terms of tyres, insurance or maintenance – and although the Boxster has length official service intervals, the savvy secondhand owner would be sensible not to go much beyond 5,000 miles before getting the oil changed.

It’s fairly fuel efficient for a sportscar of this era, though the lack of modern turbocharging means lower mpg than modern equivalents. You should be able to get 25mpg in general driving, perhaps as much as 30mpg when cruising on the motorway – and 20-ish when giving it a thrash.