Jeep Grand Cherokee SRT-8 (2006-2010) running costs and reliability

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Running costs rating: 2 out of 52.0

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.

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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 17 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

It’s no surprise that running costs are incredibly high for the SRT-8. It sits in the highest road tax band, averages a woeful 18mpg and is group 19 for insurance (the highest is 20). Jeep servicing is fairly reasonable, but the SRT-8 requires maintenance every 7500 miles, compared to 12000 miles for the standard CRD model. However, it costs far less than other similarly high performance 4x4s and is well equipped too.

With its large 6.1-litre V8 petrol engine and a fuel consumption figure of just 18mpg, it’s no surprise that the Cherokee SRT-8 performs very badly on the eco front. It emits 381g/km CO2, which is high compared to an average family car but just as polluting as the Land Rover Range Rover Sport 4.2 V8 and Porsche Cayenne Turbo. Fortunately, these high-power versions are less prevalent on the roads than greener alternatives.

Being built to survive the rigours of the off-roading, and running a servicing schedule that requires regular attention should mean that it is reliable. The record of other Jeep products seems to back this up too.