Route from Portsmouth to Cardiff
The distance between Portsmouth and Cardiff is 149 miles. Travel time is 2 hours and 38 minutes.

Driving directions from Portsmouth to Cardiff
How much does it cost to drive from Portsmouth to Cardiff?
Well, using petrol, it's £25.8. The petrol price we're talking about here is 143 pence per liter, and the car guzzles up 37.5 miles per gallon. Now, if you're carpooling with two buddies, each of you only chips in £12.9 for the trip (£25.8 divided by 2). With three mates, it's about £8.6 each (£25.8 divided by 3), and if you've got a full car of four, it's only £6.45 each (£25.8 divided by 4). The fuel cost for the journey is calculated based on how far you're driving and how much fuel your car drinks up. So, for this journey, you'd need about 18.1 liters of fuel. And that's where the £25.8 comes from for the trip from Portsmouth to Cardiff.
Diesel cost from Portsmouth to Cardiff.
The trip with diesel fuel costs 16.3 £ (151p/lt, 62.7 mpg).
For 2 passengers: 8.15 £ (16.3/2) /p.
For 3 passengers: 5.43 £ (16.3/3) /p.
For 4 passengers: 4.08 £ (16.3/4) /p.
For these reasons, diesel cars use less fuel than petrol cars:
Diesel fuel has more energy per litre than petrol. Diesel engines can drive farther and provide more power for the same fuel volume, reducing fuel consumption.
Diesel engines have higher compression ratios than petrol engines, increasing thermal efficiency. Diesel engines get more energy from each fuel unit due to this increased compression ratio. Because diesel engines are thermally efficient, they use less fuel.
Diesel engines create more torque at lower RPM than petrol engines. Diesel vehicles require less throttle input to maintain speed, which improves fuel efficiency, especially during steady-state driving.
Diesel cars consume less fuel than petrol cars due to these considerations.
Alternative routes from Portsmouth to Cardiff
The second route from Portsmouth to the Cardiff is 159.81 miles and takes 3 hours and 1 minute.
The third route from Portsmouth to the Cardiff is 167.27 miles and takes 3 hours and 28 minutes.
Which is the cheapest route from Portsmouth to Cardiff by car?
The cheapest route from Portsmouth to Cardiff is the first suggested route (149mi, 2h 38min) and costs 25.8 £ (petrol fuel cost, 143p/lt, 37.5mpg).
The second cheapest route from Portsmouth to Cardiff is the second suggested route (160mi, 3h 1min) and costs 27.7 £.
The most expensive route from Portsmouth to Cardiff is the third suggested route (167mi, 3h 28min) and costs 29 £.
For greater safety, the driver should choose the route that passes through the highway (median barrier) and not through smaller roads (curves in the road, bad road conditions, no median barrier).
How to get from Portsmouth to Cardiff?
There are three suggested routes. The fastest route is 149mi (distance from Portsmouth to Cardiff) and its duration is 2h 38min. The other route is 160mi, and its duration is 3h 1min. The slowest route is 167mi, and its duration is 3h 28min.
RouteCalculator provides you with the information to prepare your trip from Portsmouth to Cardiff by car or motorbike. It offers you alternative road routes that you can follow to go from Portsmouth to Cardiff. It provides driving directions from Portsmouth to Cardiff, i.e. where to turn and when, distance of the Portsmouth - Cardiff route, travel time, display of the route on the map, fuel cost (petrol, diesel) and toll (if exist) cost.
In case you share the journey (carpooling) from Portsmouth to Cardiff with other people or friends, RouteCalculator provides the cost of the journey and the amount that each passenger will have to pay.
Where is Portsmouth located?
Portsmouth is located in Hampshire county and in England. It is situated at an altitude of 4 meters above sea level. Portsmouth has coordinates 50.8197675o,-1.0879769o. RouteCalculator provides a map of Portsmouth from which you can plan your trips to other UK cities.
What is the location of Cardiff?
Cardiff is located in Cardiff county and in Wales. It is situated at an altitude of 12 meters above sea level. Cardiff has coordinates 51.4815810o,-3.1790900o. RouteCalculator provides a map of Cardiff from which you can plan your trips to other UK cities.
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