Infiniti G Coupe (2009-2015) running costs and reliability

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Running costs rating: 2.5 out of 52.5

Written by David Ross Published: 6 June 2019

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 26 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

While the G Coupe is well equipped as standard, it’s not very cheap to run with a thirsty V6 engine and expensive road tax. Insurance is costly too with all versions in group 45 (in the newer rating from 1-50) which is the equivalent of group 19 in the old system. And while Infiniti dealers offer superb levels of customer care that would make even Lexus owners slightly jealous, it’s not cheap by any means.

Expect service rates and parts to be expensive, and likely to be on a par with Porsche.

While a diesel is in the pipeline, the only engine currently available in the G Coupe is the thirsty 3.7-litre V6. It averages just 27mpg while CO2 emissions are high at 248g/km (246g/km with the automatic) – hardly environmentally-friendly.

Infiniti is owned by Nissan – a company which has a superb reputation for build quality and reliability. Faults are very unlikely but if there should be any issues, you’ll be dealt with by some of the best dealers around. Infiniti also offers a mobility package of roadside assistance but unlike most manufacturers, it focuses on the owner rather than the car, so you’ll never be left stranded, even if you’re in someone else’s car.