Weekly bulletin, 28 September to 4 October 2026. Published Monday 5 October 2026.
Petrol prices in Cardiff: up 1.0p this week to 175.0p
Between Monday 28 September 2026 and Sunday 4 October 2026, the average price of unleaded across 19 filling stations in Cardiff rose 1.0p to 175.0p a litre, while diesel rose 0.4p to 199.7p.
Cheapest and most expensive
On Sunday 4 October 2026, prices updated within 30 days, judged against their neighbours.
The last 30 days
Daily averages, in pence per litre. Right-click the image to save it; it is free to publish with a link.
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14 of the 23 stations seen during the week changed at least one price.
The cheapest unleaded in Cardiff on Sunday 4 October 2026 was 171.9p at Rontec Penrhos, Cardiff (CF15 7UN); the most expensive was 176.9p at Mfg Premier, Cardiff (CF23 9AE), a gap of 5.0p, or £2.50 on a 50-litre tank.
The cheapest diesel was 196.7p at Asda Leckwith Road Superstore, Cardiff (CF11 8AZ).
Across the UK, unleaded was up 0.7p over the same week, at 174.7p, which puts Cardiff 0.3p above the national average.
"Drivers in Cardiff paid 1.0p more for a litre of unleaded this week. On a 50-litre tank, that is £0.50 more than a week earlier. The gap between the cheapest and the dearest forecourt in Cardiff is 5.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk.
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Petrol prices in Cardiff: up 1.0p this week to 175.0p Between Monday 28 September 2026 and Sunday 4 October 2026, the average price of unleaded across 19 filling stations in Cardiff rose 1.0p to 175.0p a litre, while diesel rose 0.4p to 199.7p. 14 of the 23 stations seen during the week changed at least one price. The cheapest unleaded in Cardiff on Sunday 4 October 2026 was 171.9p at Rontec Penrhos, Cardiff (CF15 7UN); the most expensive was 176.9p at Mfg Premier, Cardiff (CF23 9AE), a gap of 5.0p, or £2.50 on a 50-litre tank. The cheapest diesel was 196.7p at Asda Leckwith Road Superstore, Cardiff (CF11 8AZ). Across the UK, unleaded was up 0.7p over the same week, at 174.7p, which puts Cardiff 0.3p above the national average. "Drivers in Cardiff paid 1.0p more for a litre of unleaded this week. On a 50-litre tank, that is £0.50 more than a week earlier. The gap between the cheapest and the dearest forecourt in Cardiff is 5.0p, so where you fill up still matters more than when." said Jacky A., editor of fuelpricetoday.co.uk. Source: fuelpricetoday.co.uk, weekly bulletin for Cardiff, 28 September to 4 October 2026. https://fuelpricetoday.co.uk/press/2026-W40/town-cardiff Prices are pence per litre, computed from the government's Fuel Finder open data. Free to use with a link to the source.
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- Every station (CSV)
Name, brand, postcode, coordinates, unleaded and diesel on 28 Sep and 4 Oct.
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All the figures on this page, with the 30-day series.
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Terms of use
Free to use, quote and publish, including the chart and the data, with a link to https://fuelpricetoday.co.uk/press/2026-W40/town-cardiff or a credit to fuelpricetoday.co.uk. Prices are computed from the Fuel Finder open data published by the Department for Energy Security and Net Zero under the Open Government Licence v3.0. Questions, a figure for another area, or a quote: contact@fuelpricetoday.co.uk.
How the figures are computed
Each average is the mean of the prices changed in the last 7 days at the filling stations of Cardiff, motorway services left out and prices more than 25p from the day's median discarded. The cheapest and most expensive stations are judged against the stations within 10 km, so that a typing error cannot top the list. The week runs from Monday to Sunday. Details on how this site works.