Parkers overall rating: 4.1 out of 5 4.1

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

Petrol engines 9.4 - 11.2 mpp
Diesel engines 12.1 - 13.6 mpp
Plug-in hybrid petrol engines 46.4 - 50.3 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.
Based on "Weighted" mpg; figures depend on the proportion of miles driven in pure electric mode and may vary widely

Fuel economy

Petrol engines 44.1 - 52.3 mpg
Diesel engines 60.1 - 67.3 mpg
Plug-in hybrid petrol engines 217.3 - 235.4 mpg
  • Petrol, diesel, mild-hybrid versions available
  • 2.0 TDI is the current MPG and CO2 champ
  • Plug-in eHybrid model will arrive soon

The SEAT Leon range appears to do well when it comes to fuel economy. The cheapest entry-level 1.0-litre engine claims between 47.1-52.3 mpg average fuel consumption, with the 1.5-litre TSI 130 closely matching it with 46.3-52.3mpg.

During our time of testing, the 130hp petrol engine ranged between 45-46.3mpg on a mix of motorway and country lanes. Low-speed town driving saw this drop to figures in the high 30s but it didn’t take long to see these figures rise. The 1.5-litre Evo engine can shut down two of its cylinders to further minimise fuel usage and this happened quite often in our test car, helping pinch the pennies and save fuel when you're cruising. A full tank saw a predicted range of nearly 500 miles, which is jolly impressive for a petrol hatchback of this size.

Fuel economy figures dip slightly for the most powerful SEAT Leon 150hp 1.5-litre TSI, dipping to 44.8-48.7mpg, while the mild-hybrid version and its automatic gearbox achieves a near-identical 44.1-48.7mpg.

The 2.0-litre diesel is the highest achiever with 60.1-67.3mpg, as you might expect from an oil-burner. Diesels may be falling out of fashion, but they're still the most economical way to run a SEAT Leon.

All models come with stop-start to minimise fuel usage when stationary, and fuel tank capacity is 50 litres.

CO2 emissions

When it comes to CO2 emissions, the baby 1.0-litre emits between 123-125g/km, and the 1.5 TSI 130 is almost identical, with figures of 123-126g/km. The 150hp version emits 132g/km in FR-only spec, while the eTSI ranges between 133-135g/km.

At launch, the lowest BiK company car rate was as low as 27%, but the plug-in hybrid is predicted to sit in the 10% BIK group. We'll update this SEAT Leon review once we have the full details. SEAT expects the 1.0-litre TSI SE Dynamic to be the most favoured by company car drivers - the 28% BIK group at launch may not be the cheapest Leon per month, but it might be deemed worthy of the additional cost for the extra kit provided for driver comfort.

Residual value

According to CAP data, the SEAT Leon will retain 41% of its value after three years or 60,000 miles. That's a reasonable depreciation curve, if you are considering buying your car outright.

Reliability

It's too soon to predict how reliable the Leon will be, but the previous model didn't fare badly when it came to recalls. There were three official manufacturer recalls going back to 2016, with two in 2019 relating to the indicators potentially not working properly and the driver's airbag not inflating fast enough. The one in 2016 related to child locks disengaging.

Our owner reviews of the previous model have mostly been positive, with a few negative comments pointing out poor cabin build quality and a rattle when the petrol engine switched to two-cylinder mode.

All new Leons come with a three-year/60,000-mile warranty.

Ongoing running costs

Road tax (12 months) £140 - £150
Insurance group 14 - 23
How much is it to insure?