BMW X4 — MPG & Fuel Costs 2025
A sporty SUV coupe cousin of the X3. Offering distinctive styling, sharp handling, and competent diesel cruising range.
TL;DR
30 MPG
Real-world petrol
41 MPG
Real-world diesel
65L
Tank capacity
£88.92
Full tank (petrol)
20.7p
Per mile (petrol)
Real-World Fuel Economy: The BMW X4 achieves an estimated 30 MPG (petrol) and 41 MPG (diesel) in real-world UK driving conditions, accounting for a 12% WLTP real-world penalty.
Forecourt Fuel Cost: Refueling the 65-litre tank completely costs approximately £88.92 (petrol) or £92.36 (diesel) at average UK fuel price rates.
Fuel economy at a glance
30
Real-world MPG
Petrol
36.2
Official WLTP
Petrol
41
Real-world MPG
Diesel
48.7
Official WLTP
Diesel
Annual fuel costs by mileage
| Annual mileage | Petrol | Diesel |
|---|---|---|
| 5,000 miles/yr | £1036 | £788 |
| 7,400 miles/yr(UK average) | £1534 | £1166 |
| 10,000 miles/yr | £2073 | £1576 |
| 15,000 miles/yr | £3109 | £2363 |
| 20,000 miles/yr | £4146 | £3151 |
| Full tank (65L) | £88.92 | £92.36 |
| Cost per mile | 20.7p | 15.8p |
Based on UK average fuel prices: petrol 136.8p/L · diesel 142.1p/L. Prices updated regularly.
How does the X4 compare?
Tips to get better MPG from your X4
Select Eco Pro mode to activate coasting function on motorways.
Avoid carrying heavy items in the cargo compartment.
Maintain a smooth driving style to maximize the benefit of the car's aerodynamic design.
Is the cheaper petrol station worth it?
In a BMW X4 achieving ~30 MPG real-world, if you fill 52 litres and the alternative station is 10p/litre cheaper:
£5.20
Gross saving on fuel
£0.62
Cost of 3-mile detour
£4.58
Net saving ✓
You could drive up to 25 miles round-trip before the saving disappears entirely.
Calculate for your exact situationPopular variants
Frequently asked questions
What is the real-world MPG of the BMW X4?
The BMW X4 achieves approximately 30 MPG in real-world petrol driving — around 12% lower than the official WLTP figure of 36.2 MPG due to real driving conditions. Diesel variants achieve around 41 MPG real-world.
How much does it cost to fill a BMW X4?
The BMW X4 has a fuel tank of 65 litres. At the UK average of 136.8p/litre for petrol, a full tank costs approximately £88.92. Diesel costs approximately £92.36 for a full tank.
What is the annual fuel cost for a BMW X4?
At the UK average annual mileage of 7,400 miles and current petrol price of 136.8p/litre, a BMW X4 costs approximately £1534 per year in fuel. At 10,000 miles/year the cost rises to £2073. Actual costs vary with your driving style and mileage.
Is it worth driving to a cheaper petrol station in a BMW X4?
In a BMW X4 doing ~30 MPG real-world, driving 3 miles round-trip to save 10p/litre on a 52-litre fill nets approximately £4.58 after the extra fuel cost. You could drive up to 25 miles before the saving is eaten up. Use the WorthThePump calculator for your exact situation.
How much does the BMW X4 cost per mile in fuel?
The BMW X4 costs approximately 20.7p per mile in petrol at current UK prices. Over a typical commute of 30 miles per day, that is approximately £6.21 per day in fuel.
What is the WLTP MPG figure for the BMW X4?
The official WLTP fuel economy figure for the BMW X4 is 36.2 MPG. However, real-world MPG is typically 10–15% lower than WLTP due to cold starts, air conditioning, motorway speeds, and varying loads. WorthThePump uses a 12% real-world penalty to give a more accurate estimate.
Related guides
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