Today’s Cheapest Petrol and Diesel in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer: The Full Report

A comprehensive breakdown of fuel prices in the Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer area. We analyze the market data to help you save on your next fill-up.

Jonathan Mathews
Jonathan Mathews
Automotive Data Analyst
10+ years automotive industry
Last Updated Saturday, 7th February 2026 at 06:10
2
Local Stations
24
Brands (CF Area)
3.2p
Max Price Gap
#30
UK Ranking REGION
Key Takeaways
  • Cheapest petrol: 126.7p at Asda
  • Potential savings: Up to £1.76 per tank
  • 87 stations tracked across 24 brands

Motorists in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer are currently enjoying some of the lowest fuel prices in the UK, ranking in the top 25% nationally. Over the past week, E10 petrol prices in CF have Increased 0.9p (0.7%)

According to our latest data feed from the Competition and Markets Authority (CMA), selecting the right forecourt in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer could save you up to 3.2p per litre. For an average 55-litre family car, that's a saving of over £1.76 on a single tank.

Market Competition: Moderate competition

Competition Level: High

Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer has 87 active fuel stations across 24 different brands, with a brand diversity index of 0.28 - indicating healthy market competition.

The price spread between cheapest and average stations is 6.3p, revealing significant price differences - shop around to save!

Today's Best Value

Cheapest E10 Petrol in Tonypandy, Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer:
126.7p at Asda, Colliers Way,, Tonypandy

Cheapest B7 Diesel in Tonypandy, Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer:
136.7p at Asda, Colliers Way,, Tonypandy

As expected, the supermarket chains are leading the price war in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer, aggressively undercutting the major oil brands.

Fuel Type Availability

E10
Unleaded (E10)
Widely available
82 / 87 Stations (94.3%)
E5
Super Unleaded (E5)
Moderate availability
58 / 87 Stations (66.7%)
B7
Diesel (B7)
Widely available
80 / 87 Stations (92%)
SDV
Premium Diesel
Moderate availability
35 / 87 Stations (40.2%)

Top 2 cheapest petrol stations (E10)

Here is the verified list of the most affordable places to buy standard Unleaded petrol in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer today.

PETROL LEADERBOARD Live Data
1
Asda
Colliers Way,, Tonypandy , CF40 2JQ
126.7p
BEST PRICE
2
SHELL
TYLACELYN ROAD , CF40 1JR
129.9p
+3.2p

Top 2 cheapest diesel stations (B7)

For diesel drivers, the price variance can often be even higher. The following stations are currently offering the best value for B7 Diesel in the Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer area.

DIESEL LEADERBOARD Live Data
1
Asda
Colliers Way,, Tonypandy , CF40 2JQ
136.7p
BEST PRICE
2
SHELL
TYLACELYN ROAD , CF40 1JR
139.9p
+3.2p

How to save on fuel in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer

While choosing the cheapest station is the easiest way to save, changing your driving habits can also make a significant difference to your monthly spend.

Drive Smoothly

Aggressive acceleration and heavy braking can increase fuel consumption by up to 40% in stop-and-go traffic around Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer.

Reduce Weight

Carrying an extra 50kg in your boot increases fuel consumption by 1-2%. Clear out unnecessary items.

Market Analyst Commentary
CFP Research Team

"Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer benefits from strong market competition with 24 brands operating across 87 stations. Ranking in the top 25% nationally makes this an excellent area for fuel savings, while with a 6.3p price gap between cheapest and average stations, careful selection could save £3.47 per tank."

For more detailed savings, explore our Interactive Fuel Map to scan the entire region visually.

Frequently Asked Questions

As of February 7, 2026, the cheapest station is Asda at 126.7p per litre.

There is currently a 3.2p difference between the cheapest and most expensive stations in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer. For a standard family car, this equals a saving of £1.76 per tank.

Yes, currently supermarkets (Asda) are offering the lowest prices in the area.

Our Analysis Methodology

Data Collection
  • Direct feed from UK Government CMA API
  • Updated every 30 minutes via automated polling
  • Zero user-submitted prices (prevents manipulation)
  • Last sync: 06:40, 07 Feb 2026
Quality Assurance
  • Automated anomaly detection for pricing errors
  • Cross-referenced against regional averages
  • Outliers flagged for manual review
  • Historical data tracked for trend validation
Verified Data Source: All prices displayed on this page are sourced directly from the Competition and Markets Authority's official fuel price transparency scheme. We do not accept payments from retailers to alter rankings or display preferential pricing.
Data Accuracy & Methodology

Source: We retrieve real-time pricing data directly from the UK Government CMA Open Data Scheme.

Frequency: Data for Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer was last synchronized at 06:10 today. We update our database every 4 hours to ensure accuracy.

Disclaimer: While we strive for 100% accuracy, forecourt prices can change instantly. The prices listed above were correct at the time of our last server sync.

Editorial Policy

CheckFuelPrices is independent. We do not accept payment from fuel brands to alter rankings. Read our full policy.

📈 7-Day Price Movement
Petrol (E10) 0.9p
Was: 130.3p → Now: 131.2p
Diesel (B7) Stable
Was: 138p → Now: 138.4p

Visualise the Savings

View 4 local stations on our interactive map.

Open Live Map
Popular Brands in Tonypandy, Trealaw, Penygraig, Dinas, Williamstown, Cwm Clydach, Llwynypia, Penrhiwfer
Asda SHELL