UK running-cost calculator

Kia EV9 GT-Line AWD vs Volvo EX90 Twin Motor Performance running costs

Compare cost per mile, monthly energy or fuel cost and annual running cost for Kia EV9 GT-Line AWD and Volvo EX90 Twin Motor Performance.

Static UK vehicle data.
Your prices. Clear maths.

150documented vehicles

4powertrain types

UKrates and measures

Calculation mode

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Compare two vehicles

Efficiency figures are manually checked against cited UK manufacturer sources.

Vehicle A

MY2026 · GT-Line AWD 378bhp 20-inch2.80 mi/kWh

Verified dataset

Vehicle B

MY2026 · Twin Motor Performance2.73 mi/kWh

Verified dataset

Set your assumptions

Your driving and energy prices

Official defaults are dated and may fall back when a source is unavailable. Public charging is illustrative. You can replace every value.

Annual mileage

miles

Your estimated distance over 12 months

Home electricity rate

p/kWh

GB-average Ofgem cap default — replace with your tariff
Ofgem energy price cap · 2026-07-01 · fallback

Public charging rate

p/kWh

Average price paid away from home
Editable illustrative assumption · 2026-08-27 · fallback

Charging done at home

The rest is charged at the public rate

Petrol price

p/litre

Used by petrol and all non-plug-in hybrids
DESNZ weekly road fuel prices · 2026-08-24

Diesel price

p/litre

Used only by diesel vehicles
DESNZ weekly road fuel prices · 2026-08-24

£1,210.73estimated energy or fuel cost per year

Cost per mile: 12.11p
Monthly cost: £100.89
Annual cost: £1,210.73

Lower running cost

£1,243.45estimated energy or fuel cost per year

Cost per mile: 12.43p
Monthly cost: £103.62
Annual cost: £1,243.45

Comparison summary

Kia EV9 GT-Line AWD is £2.73 cheaper per month

Under these assumptions.

Monthly difference: £2.73
Annual difference: £32.72
Per-mile difference: 0.33p

Break-even electricity rate

N/A

Break-even electricity price applies only when comparing one EV with one petrol, diesel, or non-plug-in hybrid vehicle.

How this is calculated

Assumptions

Annual mileage: 10,000 miles
Home electricity: 26.1p/kWh
Public electricity: 65p/kWh
Home charging: 80%
Petrol: 161.6p/litre
Diesel: 182.8p/litre

EV costs use a blend of home and public charging. Fuel costs use UK MPG and exactly 4.54609 litres per imperial gallon. Mild, full and series hybrids are non-plug-in petrol hybrids and use the petrol price.

Results are estimates based on stated vehicle efficiencies and entered prices. They exclude purchase price, depreciation, insurance, servicing, tax, financing, charging losses, seasonal variation and weather.

Data provenanceVehicle data and sources