Parkers overall rating: 4.1 out of 5 4.1

Miles per pound (mpp) Miles per pound (mpp)

Petrol engines 5.9 - 7.3 mpp
Diesel engines 7.0 - 8.5 mpp
Low figures relate to the least economical version; high to the most economical. Based on WLTP combined fuel economy for versions of this car made since September 2017 only, and typical current fuel or electricity costs.

Fuel economy

Petrol engines 44.0 - 54.8 mpg
Diesel engines 56.8 - 69.1 mpg

Red 2021 Citroen C4 front three-quarter driving

  • Petrol-powered models are economical with low CO2 
  • Diesels are very efficient, suited to the automatic 
  • No hybrids – if you want electrified, buy the e-C4

How much is it going to cost to run?

If you’re after the most economical C4, you know what to do – go for the diesel. As the popularity of diesel models is waning and fewer models are across the board, Citroen is in a good place to meet the demand from those who still travel long distances and keep the fuel costs down.

MPG and CO2

Not all of the official figures for fuel economy have been published yet, but we do know that the 130hp manual diesel makes up to 64.9mpg on the official Combined WLTP test. Our long-term experience in a similarly-engined Peugeot 5008 places that figure nearer 50mpg in real-world driving.

Of the petrol-powered PureTech model, the figures are also impressive – especially for those who want to buy a petrol instead of a diesel. The 130hp version is claimed to return up to 54.7mpg, while the EAT8 automatic version makes 50.3mpg.

We’ll advise what the 100hp and 155hp petrol models’ figures are, as well as the 110hp diesel’s, when they are confirmed.

  • PureTech 100 petrol manual – 122g/km CO2
  • PureTech 130 petrol manual – 120-122g/km CO2
  • PureTech 130 petrol automatic – 130-131g/km CO2
  • PureTech 155 petrol automatic – 133-134g/km CO2
  • BlueHDi 110 diesel manual – 114-115g/km CO2
  • BlueHDi 130 diesel automatic – 120-121g/km CO2

Servicing and maintenance

Citroen offers a servicing package that you pay for up front for up to three years or 35,000 miles. This is available for the first year from when the car is registered.


  • Tried and tested mechanical components
  • Citroen reliability is above industry average
  • C4 has yet to prove itself

Sharing much of its technology with a wide number of other Citroens as well as DSs, Peugeots, Vauxhalls, the fundamentals of the C4 are tried and tested product, despite being new to the market. This is a good thing, as parent company PSA’s current model range is much more reliable than those of their predecessors.

However, we will monitor the situation as the C4 ages to check whether recalls or other issues develop.

Red 2021 Citroen C4 rear light detail

Ongoing running costs

Road tax (12 months) £165
Insurance group 13 - 22
How much is it to insure?