Is CNG cheaper than diesel for trucks?

CNG (Compressed Natural Gas) is typically cheaper than diesel on an energy-equivalent basis in Europe. In 2026, European CNG station prices range from approximately €0.70–1.10/kg in Italy (lowest in Europe; Italy has the largest CNG network with 1,400+ stations), to €1.20–1.60/kg in Germany, France, and the UK. At typical heavy truck energy consumption of approximately 25–30 kg CNG per 100 km (vs 30–35 litres diesel per 100 km), CNG fuel costs at Italian prices can be approximately 30–40% lower than diesel. However, the fuel cost advantage narrows in markets with fewer CNG stations (UK, Eastern Europe) due to premium retail pricing at sparse network points. The CNG vs diesel economics also depend on whether the fleet can install a private depot filling station — depot CNG is significantly cheaper than public network retail prices.

What is the difference between CNG and LNG vehicles?

CNG (Compressed Natural Gas) vehicles store gas at high pressure (~200–250 bar) in steel or carbon fibre cylinders. Typical CNG range: 300–500 km for vans and light trucks; suitable for urban distribution and short-haul routes. LNG (Liquefied Natural Gas) vehicles store natural gas in cryogenic liquid form (-162°C) in insulated tanks, allowing much higher energy density per volume. LNG range: 800–1,500+ km, suitable for long-haul heavy trucks. LNG trucks typically weigh 500–800 kg more than diesel equivalents due to cryogenic tank weight, reducing payload slightly. Both CNG and LNG are unambiguously lower NOx and particulate emitters than diesel; their CO2 reduction depends on whether the gas is fossil-origin (10–20% CO2 reduction vs diesel on well-to-wheel basis) or bio-LNG/bio-CNG (up to 80–90% CO2 reduction).

Which truck manufacturers offer LNG and CNG models?

Major European truck manufacturers offering LNG and/or CNG models in 2026: Iveco (CNG and LNG; Stralis NP and S-Way NP; extensive gas truck experience); Volvo Trucks (FH LNG, FM LNG, FH CNG; Sweden-based with bio-LNG strategy); Scania (LNG and CNG; R-series and G-series gas versions); Mercedes-Benz Trucks (CNG Actros; limited LNG currently); Ford Trucks (CNG versions); SANY (Chinese manufacturer with European LNG truck entry). Iveco is the market leader in European gas trucks, particularly in Italy and Spain. Volvo has focused on bio-LNG as a premium offering for large fleets with CO2 reduction commitments. The LNG truck market is concentrated in long-haul operations in Italy, Spain, Netherlands, Germany, and UK, where the combination of LNG range and lower fuel cost vs diesel is most compelling.

Natural Gas Vehicle Guide: CNG & LNG

Published 1 August 2026 · Updated 19 October 2026

Natural gas vehicles (NGVs) — running on either CNG (Compressed Natural Gas) or LNG (Liquefied Natural Gas) — offer a commercially viable alternative to diesel for road haulage, urban distribution, and bus operations. Italy leads Europe with over 1.5 million CNG passenger cars and 1,400+ CNG stations; Northern Europe and the UK are catching up in LNG for heavy trucks. With bio-LNG now available in volume, NGVs can offer significant CO2 reductions versus diesel while using existing gas infrastructure and proven engine technology.

For CNG concept and pricing, see our CNG glossary entry. For trucking fuel cost context, see our trucking fuel costs guide. For LNG context, see our LNG glossary entry.

CNG vs LNG: which is right for which use case?

Property	CNG	LNG
Storage	Compressed gas at 200–250 bar	Cryogenic liquid at -162°C
Typical range	300–500 km (trucks)	800–1,500+ km (heavy trucks)
Best use case	Urban distribution, short-haul (<300 km), gas buses	Long-haul HGV (500+ km routes), cross-country haulage
Infrastructure cost	Lower; depot fast-fill stations widely available	Higher; cryogenic storage required at stations
Refuel time	10–20 min (public fast-fill); overnight slow-fill at depot	10–15 min (similar to diesel)
Energy density	Lower (~8.5 MJ/l at 250 bar vs diesel 35.8 MJ/l)	Higher (~22 MJ/l; closer to diesel)
Tank weight penalty	Moderate (+200–400 kg vs diesel)	Significant (+500–800 kg vs diesel)

Running costs: gas vs diesel for heavy trucks (EU 2026)

Fuel	Price (typical)	Consumption (HGV)	Fuel cost per 100 km
Diesel (B7)	€1.30–1.60/l (net of AdBlue refund)	28–32 l/100 km	€36–51/100 km
CNG (Italy network)	€0.70–1.10/kg	22–28 kg/100 km	€15–31/100 km
CNG (Germany/UK)	€1.20–1.60/kg	22–28 kg/100 km	€26–45/100 km
LNG (Europe network)	€0.90–1.40/kg	28–35 kg/100 km	€25–49/100 km
Bio-LNG (premium)	€1.40–2.00/kg	28–35 kg/100 km	€39–70/100 km

Depot CNG vs public network
The economics of CNG for fleet operators are most compelling with private depot filling stations. A depot compressor station serving 20+ CNG trucks can reduce CNG fuel costs to €0.50–0.80/kg (wholesale gas + compression cost), versus €1.20–1.60/kg at public retail stations. The payback period for depot CNG infrastructure (typically €100,000–300,000) depends on fleet size and utilisation but can be 2–4 years at current diesel-CNG differentials. This is why CNG fleet adoption is concentrated in large logistics operators with fixed depots (supermarket distribution, refuse collection, utility fleets).

European CNG and LNG refuelling network (2026)

Country	CNG stations	LNG stations	Notable feature
Italy	1,400+	~120	Europe's densest CNG network; FIAT history
Germany	~750	~100	Major motorway coverage; Shell, Total, Aral operators
Netherlands	~200	~80	Rotterdam LNG hub advantage; high LNG truck adoption
Spain	~500	~90	Growing fast; Iberdrola and Naturgy network expansion
France	~400	~80	ENGIE and Total network; strong bus CNG market
UK	~80	~40	Limited; concentrated on motorway corridors

Gas truck options: major manufacturers (2026)

Key vehicles for CNG/LNG fleet operators in Europe:

Iveco S-Way NP (Natural Power): CNG and LNG versions; market-leading gas truck experience; 500 km CNG range or 1,600 km LNG range; widely serviced across EU
Volvo FH LNG / FM LNG: Strong bio-LNG strategy; Volvo targets fleet CO2 reduction commitments; 1,000+ km LNG range; premium positioning
Scania Gas Trucks: CNG and LNG variants; 13-litre gas engine; EURO 6 compliant; bio-gas compatible from factory
Mercedes-Benz Actros CNG: 13-litre CNG engine; 500 km range; primarily urban and regional distribution markets

Bio-CNG and bio-LNG: the sustainability step-up

Biomethane — produced from anaerobic digestion of organic waste, agricultural residues, or sewage — is chemically identical to fossil natural gas and fully compatible with all CNG/LNG vehicles. Injected into the grid or liquefied, biomethane as bio-CNG or bio-LNG can reduce well-to-wheel CO2 emissions by 80–90% versus diesel:

EU biomethane production is scaling rapidly under the REPowerEU targets (35 billion m³ by 2030)
Bio-LNG is currently priced at a premium of €0.40–0.80/kg above fossil LNG, representing approximately 40–80% higher fuel costs
However, bio-LNG qualifies for HGV ZECV (Zero Emission Commercial Vehicle) incentives in some jurisdictions and satisfies corporate sustainability procurement requirements
The RED III biofuel mandate framework creates a compliance pathway using bio-LNG in transport to meet company-level renewable fuel obligations

For biofuel context, see our biofuel guide and our HVO renewable diesel guide.

CNG and LNG explained: meaning, costs and filling stations

What is CNG? CNG stands for compressed natural gas — methane (CH₄) compressed to approximately 200–250 bar and stored in high-pressure cylinders on the vehicle. The CNG meaning in transport is straightforward: it is the same natural gas piped to homes for heating and cooking, but compressed for use as a vehicle fuel. CNG fuel cost varies significantly by market — in Italy, where CNG filling stations are most dense (1,400+), prices of €0.70–1.10/kg make CNG vs petrol comparisons very favourable, with savings of 30–50% per kilometre. CNG vehicle fuel economy is broadly comparable to petrol on an energy-equivalent basis, though CNG vehicles typically carry a weight penalty from the heavy pressure cylinders. CNG cars explained in brief: most CNG passenger cars are bi-fuel (petrol + CNG) with factory-fitted or aftermarket CNG tanks, commonly offered by Fiat, Volkswagen, SEAT, and Skoda in European markets. The IEA's natural gas analysis provides comprehensive data on global natural gas vehicle adoption and infrastructure development.

What is LNG? LNG stands for liquefied natural gas — methane cooled to -162°C until it becomes a liquid, reducing its volume by approximately 600 times compared with gas at atmospheric pressure. The LNG meaning for road transport is that it enables long-range heavy trucks to run on natural gas without the range limitations of CNG. LNG trucks typically achieve 800–1,500 km range on a single tank, making LNG viable for long-haul operations where CNG's 300–500 km range falls short. LNG fuel price in Europe ranges from €0.90–1.40/kg at public stations, making LNG vs CNG economics dependent on route profile: CNG is cheaper for urban and regional operations; LNG wins for long-distance haulage. The comparison of LNG vs LPG is less direct — LNG is methane for heavy trucks; LPG is propane/butane primarily for passenger cars. They serve different market segments with little overlap. The BP Statistical Review of World Energy tracks global LNG trade flows that influence European LNG vehicle fuel pricing.

The broader category of natural gas vehicles encompasses both CNG and LNG powertrains. The CNG vs LPG comparison is relevant for fleet operators choosing between alternative fuels: CNG offers better CO₂ reduction (20–25% vs 15–20% for LPG) and lower fuel cost in gas-rich markets, but requires heavier tanks and has fewer filling stations in most countries outside Italy. The future of natural gas in transport is being shaped by biomethane — renewable gas produced from organic waste that is chemically identical to fossil natural gas and delivers up to 90% CO₂ reduction on a well-to-wheel basis. The European Commission's bioenergy portal tracks biomethane production scaling under the REPowerEU targets, which aim for 35 billion m³ of annual EU biomethane production by 2030 — a supply increase that would make bio-CNG and bio-LNG increasingly available and competitive for compressed natural gas vehicle operators.

Frequently asked questions

Is CNG cheaper than diesel for trucks? CNG is typically cheaper than diesel in markets with dense networks (Italy: €0.70–1.10/kg ≈ 30–40% saving vs diesel) but less so in sparse markets (UK: €1.20–1.60/kg ≈ comparable to diesel). Depot CNG (private compressor station) offers the best economics at €0.50–0.80/kg — payback period 2–4 years for 20+ truck fleets. Fleet size and depot infrastructure determine whether CNG is compelling.: CNG is typically cheaper than diesel in markets with dense networks (Italy: €0.70–1.10/kg ≈ 30–40% saving vs diesel) but less so in sparse markets (UK: €1.20–1.60/kg ≈ comparable to diesel). Depot CNG (private compressor station) offers the best economics at €0.50–0.80/kg — payback period 2–4 years for 20+ truck fleets. Fleet size and depot infrastructure determine whether CNG is compelling.
What is the difference between CNG and LNG vehicles? CNG is gas compressed at 200–250 bar — best for urban/short-haul (300–500 km range); LNG is cryogenic liquid (-162°C) — best for long-haul (800–1,500 km). CNG infrastructure is cheaper to install; LNG requires cryogenic storage. LNG tanks are heavier (+500–800 kg vs diesel), reducing payload. Both are lower NOx and particulate than diesel; CO2 reduction depends on fossil vs bio-gas sourcing.: CNG is gas compressed at 200–250 bar — best for urban/short-haul (300–500 km range); LNG is cryogenic liquid (-162°C) — best for long-haul (800–1,500 km). CNG infrastructure is cheaper to install; LNG requires cryogenic storage. LNG tanks are heavier (+500–800 kg vs diesel), reducing payload. Both are lower NOx and particulate than diesel; CO2 reduction depends on fossil vs bio-gas sourcing.
Which truck manufacturers offer LNG and CNG models? Major European gas truck options: Iveco S-Way NP (CNG and LNG; market leader); Volvo FH/FM LNG (bio-LNG focus; 1,000+ km range); Scania CNG/LNG (13-litre gas engine; bio-gas compatible); Mercedes-Benz Actros CNG (urban/regional). Iveco leads the European gas truck market, particularly in Italy and Spain. Volvo targets premium sustainability positioning with bio-LNG.: Major European gas truck options: Iveco S-Way NP (CNG and LNG; market leader); Volvo FH/FM LNG (bio-LNG focus; 1,000+ km range); Scania CNG/LNG (13-litre gas engine; bio-gas compatible); Mercedes-Benz Actros CNG (urban/regional). Iveco leads the European gas truck market, particularly in Italy and Spain. Volvo targets premium sustainability positioning with bio-LNG.
What is the difference between CNG and LPG for vehicles? CNG (compressed natural gas, methane) is stored at 200–250 bar in heavy cylinders; LPG (propane/butane) is stored as a liquid at only 5–10 bar in lighter tanks. CNG offers slightly better CO₂ savings (20–25% vs 15–20%) and can be cheaper per km in gas-rich markets (Italy, Pakistan), but infrastructure is less widespread than LPG in most European countries. LPG conversion is cheaper (€1,000–3,500 vs €2,000–4,000 for CNG) and tanks are lighter, making LPG more practical for passenger cars. CNG is best suited for urban fleets with depot filling; LPG for individual high-mileage drivers.: CNG (compressed natural gas, methane) is stored at 200–250 bar in heavy cylinders; LPG (propane/butane) is stored as a liquid at only 5–10 bar in lighter tanks. CNG offers slightly better CO₂ savings (20–25% vs 15–20%) and can be cheaper per km in gas-rich markets (Italy, Pakistan), but infrastructure is less widespread than LPG in most European countries. LPG conversion is cheaper (€1,000–3,500 vs €2,000–4,000 for CNG) and tanks are lighter, making LPG more practical for passenger cars. CNG is best suited for urban fleets with depot filling; LPG for individual high-mileage drivers.
How much does CNG cost compared to petrol and diesel? CNG is typically priced per kilogram — 1 kg of CNG has roughly equivalent energy to 1.3 litres of petrol or 1.15 litres of diesel. In Italy (Europe's cheapest CNG market), prices of €0.70–1.10/kg equate to roughly €0.54–0.85 per petrol-equivalent litre — a saving of 40–55% vs petrol. In Germany and the UK, CNG at €1.20–1.60/kg is more comparable to diesel cost. For heavy trucks, depot CNG at €0.50–0.80/kg offers the best economics — significantly cheaper than diesel on a per-km basis for fleets with 20+ vehicles.: CNG is typically priced per kilogram — 1 kg of CNG has roughly equivalent energy to 1.3 litres of petrol or 1.15 litres of diesel. In Italy (Europe's cheapest CNG market), prices of €0.70–1.10/kg equate to roughly €0.54–0.85 per petrol-equivalent litre — a saving of 40–55% vs petrol. In Germany and the UK, CNG at €1.20–1.60/kg is more comparable to diesel cost. For heavy trucks, depot CNG at €0.50–0.80/kg offers the best economics — significantly cheaper than diesel on a per-km basis for fleets with 20+ vehicles.
Where are CNG filling stations in Europe? Italy leads Europe with 1,400+ CNG stations — the densest network in Europe, driven by Fiat's long history of CNG vehicles. Germany has ~750 stations covering major motorways. Spain (~500), France (~400), and the Netherlands (~200) have growing networks. The UK has only ~80 CNG stations, concentrated on motorway corridors. For LNG (heavy trucks), Germany (~100 stations), Italy (~120), Netherlands (~80), and Spain (~90) have the most developed coverage. The European Commission's AFIR (Alternative Fuels Infrastructure Regulation) mandates CNG station deployment every 150 km on TEN-T core network roads by 2025.: Italy leads Europe with 1,400+ CNG stations — the densest network in Europe, driven by Fiat's long history of CNG vehicles. Germany has ~750 stations covering major motorways. Spain (~500), France (~400), and the Netherlands (~200) have growing networks. The UK has only ~80 CNG stations, concentrated on motorway corridors. For LNG (heavy trucks), Germany (~100 stations), Italy (~120), Netherlands (~80), and Spain (~90) have the most developed coverage. The European Commission's AFIR (Alternative Fuels Infrastructure Regulation) mandates CNG station deployment every 150 km on TEN-T core network roads by 2025.