Choosing a car

Diesel, petrol, LPG or hybrid: which engine to choose in 2026

Everyone asks this before buying a car — and most answer wrong, because they only look at fuel consumption. In reality, what really pays off is decided by the total cost of ownership and one simple question: how much and where do you drive. A diesel that’s brilliant on the motorway can be the worst choice in the city. Below we break the four drivetrains into their parts, show the break-even points in numbers, and give a simple decision rule.

The overriding rule: how much and where you drive

Europe’s biggest cost comparison (ADAC 2026, ~270 model pairs) ends with one conclusion: there’s no rule that a given drivetrain is always cheaper. The outcome is decided by the model, annual mileage, purchase, servicing, tyre and depreciation costs — not fuel consumption alone. So before you pick a drivetrain, answer: how many km a year, and what share is city vs motorway.

Four drivetrains — pros, cons, who they suit

Diesel — king of long journeys. Uses 20–30% less than petrol, has high torque and huge longevity (300,000–500,000 km). But: pricier servicing (injection, DPF, EGR, AdBlue), sensitivity to city driving (DPF clogging on short trips), and low-emission-zone restrictions. Suits: 18,000–25,000 km+, lots of motorway, heavier cars (Passat, Superb, SUV, estate).

Petrol — the safe middle. Cheaper car, simple and cheap servicing, no DPF issues, stable in any conditions. Cons: higher consumption than diesel, less economical in the urban cycle at high mileage. Suits: moderate mileage (up to ~15,000–20,000 km), city driving, those who value simplicity and cheap servicing.

LPG — the cheapest fuel. Gas costs about half the price of petrol, with 10–15% higher consumption — real fuel savings of 40–50%. Cons: installation cost (pays back at sufficient mileage), smaller boot (tank), slightly rarer LPG servicing. Suits: high-mileage petrol drivers who want to slash the fuel bill.

Hybrid (HEV) — master of the city. In town it often runs on the electric motor and recovers braking energy — can use 30–40% less than petrol. Holds value very well (lower depreciation than diesel/petrol). Cons: pricier to buy, battery cost/condition on older examples. Suits: mostly city and mixed driving. Note: a plug-in (PHEV) only pays off if you charge regularly — without charging it runs “on fuel” and the advantage vanishes.

Table: when each drivetrain wins

At up to 10,000–12,000 km a year, differences in fuel cost are smaller than differences in purchase price — then the car’s price, servicing access and convenience matter more than the drivetrain type.

Don’t forget depreciation and the whole TCO

A drivetrain isn’t just fuel. Hybrids usually hold value best, diesels can be sensitive to expensive ancillary failures, and an LPG conversion is viewed variably at resale. Before you calculate “value for money”, work out the full annual running cost — fuel is only part of the bill. We laid it out in a separate post on the cost of owning a car in Poland.

And if you’re considering an EV imported from the EU to Ukraine — remember that VAT was added at customs clearance from 2026, which changes the maths.

This material is informational. Break-even points are typical market values (incl. ADAC 2026) — your result depends on the specific model, mileage, driving style and fuel prices. Work out the full TCO for your case before buying.

Financing the purchase? Calculate the loan or lease payment: Finumero →

Frequently asked questions (FAQ)

From how many km a year does a diesel pay off? Usually from about 18,000–25,000 km a year, and for heavier cars even from ~13,000 km. Below ~15,000 km and mostly city driving, petrol comes out better, because fuel savings don’t cover the diesel’s higher purchase and servicing costs.

How much do you save on LPG? LPG costs about half the price of petrol, with 10–15% higher consumption. Real savings on fuel alone are usually 40–50%. The conversion pays back faster the more you drive.

Is a hybrid worth it in the city? Yes. In town a hybrid often runs on the electric motor and recovers braking energy, so it can use 30–40% less than a petrol car. It’s usually the most economical drivetrain for the city, and it also holds value well.

Diesel or petrol for the city? For mostly city driving and lower mileage, petrol is better: simpler and cheaper servicing, no DPF issues (the diesel’s DPF clogs on short trips). A diesel makes sense in the city only at genuinely high mileage.