Route from Cardiff to Plymouth
The distance between Cardiff and Plymouth is 151 miles. Travel time is 2 hours and 40 minutes.

Driving directions from Cardiff to Plymouth
What's the cost of a drive from Cardiff to Plymouth?
The journey, powered by petrol, sets you back £26.1. In this calculation, we're crunching numbers based on a petrol price of 143 pence per liter and a car's thirst of 37.5 miles per gallon. If you're carpooling with a buddy, that's £13.05 each (£26.1 divided by 2). With a trio onboard, it drops to around £8.7 a head (£26.1 divided by 3), and with a full car of four, it's a mere £6.53 per person (£26.1 divided by 4).
Let's dig into the math behind it. The fuel expenditure hinges on the distance covered and the car's efficiency. For this particular jaunt, you're looking at guzzling down roughly 18.3 liters of fuel. Crunching the numbers, that's where the £26.1 total comes from for the trip from Cardiff to Plymouth.
Diesel cost from Cardiff to Plymouth.
The trip with diesel fuel costs 16.5 £ (151p/lt, 62.7 mpg).
For 2 passengers: 8.25 £ (16.5/2) /p.
For 3 passengers: 5.5 £ (16.5/3) /p.
For 4 passengers: 4.13 £ (16.5/4) /p.
When compared to gasoline-powered vehicles, diesel vehicles often have a lower fuel usage percentage for the following reasons:
Diesel fuel has a higher energy density than gasoline, meaning that it contains more energy per litre than gasoline does. Diesel engines are able to create more power and travel further for the same amount of gasoline, which results in a lower overall fuel consumption. This is because diesel engines also travel further.
Diesel engines operate at higher compression ratios than petrol engines, which results in increased thermal efficiency for diesel engines. Because of this increased compression ratio, diesel engines are able to extract a greater amount of energy from each individual dose of fuel. Because of this, diesel engines are often more thermally efficient, which results in a reduction in the amount of fuel these engines consume.
Diesel engines have a tendency to produce higher torque at lower engine speeds (RPM) compared to petrol engines. This is because diesel engines are more efficient than petrol engines. Because diesel vehicles require less throttle input to maintain speed, this trait enables diesel vehicles to retain superior fuel efficiency, particularly during steady-state cruising. This is especially true during the cruising phase.
In comparison to their gasoline-powered counterparts, diesel vehicles have a generally lower fuel consumption, which can be attributed to the combined effects of these particular characteristics.
Alternative routes from Cardiff to Plymouth
Meanwhile, the least speedy route from Cardiff to Plymouth covers 232.59 miles and necessitates 4 hours and 55 minutes for completion.
Which is the cheapest route from Cardiff to Plymouth by car?
The cheapest route from Cardiff to Plymouth is the first suggested route (151mi, 2h 40min) and costs 26.1 £ (petrol fuel cost, 143p/lt, 37.5mpg).
The most expensive route from Cardiff to Plymouth is the second suggested route (233mi, 4h 55min) and costs 40.3 £.
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 Cardiff to Plymouth?
There are two suggested routes. The fastest route is 151mi (distance from Cardiff to Plymouth) and its duration is 2h 40min. The slowest route is 233mi, and its duration is 4h 55min.
RouteCalculator provides you with the information to prepare your trip from Cardiff to Plymouth by car or motorbike. It offers you alternative road routes that you can follow to go from Cardiff to Plymouth. It provides driving directions from Cardiff to Plymouth, i.e. where to turn and when, distance of the Cardiff - Plymouth 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 Cardiff to Plymouth with other people or friends, RouteCalculator provides the cost of the journey and the amount that each passenger will have to pay.
Where is Cardiff located?
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.
What is the location of Plymouth?
Plymouth is located in Devon county and in England. It is situated at an altitude of 27 meters above sea level. Plymouth has coordinates 50.3754565o,-4.1426565o. RouteCalculator provides a map of Plymouth from which you can plan your trips to other UK cities.