17th Mar 2026

Tesla Model 3 vs BMW 320d — which actually costs less to run in 2026?

Core Message

We’ve broken it down using real UK driving at 10,000 miles per year:

Tesla Model 3 (home charged overnight)

Approx 3.5 miles per kWh
Octopus overnight rate: ~8p/kWh
Annual charging cost: ~£229
Cost per mile: ~2.3p

BMW 320d Diesel

Approx 50 mpg
Diesel: ~£1.55 per litre
Annual fuel cost: ~£1,410
Cost per mile: ~14.1p

The Reality

That’s a difference of around £1,100–£1,200 per year in fuel alone.

Over a typical 4-year ownership?
You’re looking at £4,500+ saved just on energy.

But It’s Not Just About Cost

Model 3 advantages:

Ultra low running costs
Smooth, quiet driving
No traditional servicing (no oil, belts, etc.)
Ideal for daily commuting

320d advantages:

Longer range in one go
Faster refuelling
Better for high motorway mileage
No reliance on home charging

Our Honest Advice (What We Tell Customers)

If you can charge at home on a cheap overnight tariff…
The EV wins on cost. Clearly.

If you do big miles, long trips, or can’t charge easily…
A diesel like the 320d still makes a lot of sense.

Not sure which suits your lifestyle?

Visit our website to view our current stock or request a personalised video via WhatsApp.
Our team are available throughout the day and most evenings to guide you through your options — including finance from 9.9% APR (subject to status).