LPG Autogas Guide 2026: Cost, Conversion, Countries & Pump Prices

Published 1 June 2026 · Updated 15 October 2026

LPG autogas is the world's most widely used alternative road fuel by vehicle count, with over 28 million autogas vehicles globally. In Europe, it is concentrated in Poland, Turkey, Italy, and the Netherlands. In Asia, South Korea and Australia have substantial autogas fleets. The appeal is straightforward: LPG typically costs 40–55% less per litre than petrol at the pump, with modest conversion costs and no range anxiety. This guide explains how it works, what conversion costs, and when the economics make sense.

For live LPG pump prices globally, use the fuel price explorer. For a deeper look at LPG as a product, see our LPG glossary entry.

How autogas works in a petrol car

A converted autogas vehicle runs on both petrol and LPG, switching between them automatically. The system adds:

• LPG tank: Typically a toroidal (doughnut) tank fitted in the spare wheel well, or a cylindrical tank in the boot. Capacity is usually 40–70 litres.
• Vaporiser/reducer: Converts liquid LPG to gas and regulates pressure to the injection system.
• Injection rail: Sequentially injects LPG vapour into the intake manifold (older systems) or directly into injectors (newer direct-injection systems).
• ECU: The autogas controller monitors lambda (oxygen sensor) feedback and adjusts mixture to maintain stoichiometric combustion.

The car starts on petrol (to warm the catalytic converter) and switches automatically to LPG after ~60–90 seconds. The driver can switch back manually. The petrol tank is retained for emergencies.

Conversion cost and what to expect

The conversion must be done by a certified installer (in EU, under UNECE Regulation 67-01 or 115). Post-conversion, the vehicle needs certification and a modification declaration for insurance and registration. Some insurers surcharge converted vehicles; others are neutral.

LPG fuel consumption vs petrol

LPG has ~20% lower energy density per litre than petrol (24 MJ/litre vs 32 MJ/litre). This means an LPG-converted car consumes approximately 15–20% more litres per 100 km on LPG than on petrol. A car achieving 7 l/100km on petrol will typically use 8–8.5 l/100km on LPG. The financial saving still holds because LPG is typically 40–55% cheaper per litre.

Example calculation at 2026 Western European prices (petrol ~€1.70/l, LPG ~€0.80/l):

• Petrol: 7 l/100km × €1.70 = €11.90/100km
• LPG: 8.5 l/100km × €0.80 = €6.80/100km
• Saving: ~43% per 100km

At 20,000 km/year, that is approximately €1,020/year saving — recovering a €1,500 conversion in under 18 months.

LPG autogas pump prices by country (2026)

For a full international comparison, use the fuel price explorer. The LPG price advantage reflects lower excise duty treatment in most countries — LPG is typically taxed at 40–60% of the petrol excise rate. For excise duty context, see our excise duty glossary entry.

Station availability and networks

LPG autogas availability varies enormously by country. Poland leads Europe with over 7,000 LPG stations — more than any other European country — serving its ~3 million autogas vehicles. Italy (~3,500 stations), the Netherlands (~2,300), and Germany (~7,000) have good networks. France has a moderate network (~1,800). The UK has seen network contraction as LPG has lost ground to the diesel market and now EVs.

Outside Europe, South Korea (~2,200 stations), Turkey (~9,000), and Australia (~3,200) have well-established networks. Middle Eastern countries — particularly Turkey and Egypt — have large LPG vehicle fleets due to domestic gas production making LPG very cheap.

Environmental case for autogas

LPG combustion produces approximately 15–20% less CO₂ per unit energy than petrol, and significantly lower particulate matter and NOₓ than diesel. It is not a zero-emission fuel, but in the current grid-carbon context, an LPG vehicle in a country with a high-carbon electricity grid produces lower lifecycle emissions than many battery EVs charged on that grid.

The case weakens as electricity grids decarbonise — in France (nuclear-heavy) or Scandinavia (hydro), EV lifecycle emissions are already lower than autogas. For the broader energy transition context, see our glossary entry on energy transition.

LPG vs CNG for vehicles

For more on CNG as a vehicle fuel, see our CNG glossary entry. In Nigeria's context, CNG is being promoted as a subsidy-reform alternative — see our analysis of the Nigeria fuel subsidy removal.

Understanding LPG: meaning, composition and comparisons

What is LPG? LPG stands for Liquefied Petroleum Gas — a hydrocarbon fuel composed primarily of propane (C₃H₈) and butane (C₄H₁₀), stored as a liquid under moderate pressure. The LPG meaning encompasses a family of gases that are by-products of natural gas processing and crude oil refining. A common question is LPG vs propane: in most markets, LPG is a blend of propane and butane, while "propane" refers to the pure gas. In cold climates, LPG autogas has a higher propane content (propane remains gaseous at lower temperatures), while warmer climates use a higher butane fraction. The distinction between LPG vs natural gas is fundamental: LPG is a liquid at moderate pressure (5–10 bar) while natural gas (methane) must be compressed to 200+ bar (CNG) or cooled to -162°C (LNG) for vehicle use. This makes LPG far simpler and cheaper to store and distribute. The IEA's oil and gas analysis provides detailed data on global LPG production and consumption patterns.

The comparison of LPG vs petrol for vehicle use centres on cost, emissions, and practicality. LPG fuel price is typically 40–55% below petrol at the pump, though LPG fuel consumption is approximately 15–20% higher by volume due to lower energy density. LPG vehicle advantages include significantly lower CO₂ emissions (15–20% less than petrol), near-zero particulate matter, lower NOₓ than diesel, and access to reduced-rate road taxes and congestion charges in some jurisdictions. LPG vehicle disadvantages include reduced boot space (from the LPG tank), a limited refuelling network compared with petrol and diesel, slightly reduced engine power (typically 5–10% on LPG), and the upfront LPG conversion cost of €1,000–3,500. The Australian Government's fuel consumption guide includes LPG vehicle data, reflecting Australia's established autogas market, and EU energy market data tracks LPG taxation and availability across member states.

LPG cars explained in the simplest terms: a converted LPG vehicle is a bi-fuel system that runs on both petrol and LPG. The car starts on petrol (to warm the catalytic converter) and switches to LPG automatically after about a minute. The driver can switch back to petrol at any time via a dashboard toggle. The petrol tank is retained as a backup, giving the vehicle dual-fuel range — often 800–1,200 km combined. What is autogas? It is simply the commercial name for LPG when sold as a vehicle fuel, meeting the EN 589 European automotive fuel standard. The terms "autogas" and "LPG for cars" are used interchangeably. For the definition LPG in full technical context, including what does LPG stand for and the complete LPG gas meaning, see our LPG glossary entry. The OPEC Monthly Oil Market Report provides upstream supply context for the petroleum gases that become LPG at the refinery.