Parkers overall rating: 4 out of 5 4.0

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

Petrol engines 6.6 - 7.7 mpp
Diesel engines 7.6 - 9.3 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.

Fuel economy

Petrol engines 31.0 - 36.2 mpg
Diesel engines 37.7 - 46.3 mpg

BMW 3 Series GT running costs should be in line with rivals. The most frugal engine will be the 143hp 2.0-litre diesel unit in the 318d. It has a claimed figure of 62.8 when mated to the manual ‘box – expect high 50s in real world driving.

BMW 3 Series Gran Turismo emissions are fairly low. The most environmentally friendly GT is the 143hp 2.0-litre diesel unit in the 318d in SE trim. It emits 119g/km when using the manual gearbox. The fastest and most powerful BMW 3 Series GT as expected emits the highest amount of CO2 at 188g/km.

Even though this is a new product, BMW 3 Series Gran Turismo reliability levels should prove to be excellent.

The majority of engines and mechanicals are well-proven and the German marque fares well in reliability surveys.

The current generation of 3 Series saloon and Touring models have been largely problem-free and we expect this GT version to be just as well-built.

Ongoing running costs

Road tax (12 months) £30 - £475
See tax rates for all versions
Insurance group 23 - 42
How much is it to insure?