Rolling road · Llandow, Vale of Glamorgan
Measure power and torque, establish a reliable baseline or investigate a running problem on our braked 2WD rolling road. Choose the session that matches the question you need answered.
Book the right test
A power run records what the engine produces. A diagnostic session gives the technician time and data to investigate why a vehicle is not performing as it should.
For a baseline or before-and-after comparison
Two controlled runs measure peak power, peak torque and the shape of the delivery through the rev range. It is the straightforward choice when the vehicle is running correctly and you want an accurate result.
For low power, flat spots or a running concern
We reproduce the problem under controlled load and combine the dyno result with targeted diagnostic data. The aim is to narrow down the cause of a performance or running issue before parts are replaced or tuning is considered.
Start here when you want a broader engine baseline before tuning, or when low power, poor emissions or inconsistent running needs a structured check rather than a result sheet alone.
See what the health check coversFixed session£150
Extra rolling road time for an agreed test plan, extended diagnostic work or a bespoke session is charged by the hour. Tell us what you need to measure before booking.
Discuss a test planPer hour£95
What the graph can tell you
A rolling road power run plots the measured power and torque across the rev range. That makes it useful for checking a healthy vehicle, recording a baseline or comparing the outcome of later work.
If there is a warning light, hesitation, boost problem, unusual smoke, misfire or unexplained power loss, choose a dyno diagnostic session. That booking creates time to investigate the behaviour rather than simply recording it.
Our dyno facilities
Our rolling road is based in the Vale of Glamorgan and is used by drivers from Cardiff, Bridgend, Barry, Cowbridge, Swansea, Newport and across South Wales.
Before your appointment
A dyno places the engine and drivetrain under load. The vehicle must be safe to test, and we need to know about faults or unusual requirements before it enters the dyno cell.
Dyno questions
Send your registration, drivetrain and a short description of any modifications or running issue. We can then confirm the correct booking.
Ask a dyno questionA 2WD dyno power run at Llandow Tuning costs £75. It includes two controlled power runs with measured power and torque results.
A power run measures current power and torque. A £150 dyno diagnostic session is the correct choice when the vehicle has a running issue because the technician uses controlled-load testing and targeted data gathering to investigate the fault.
We have a MAHA LPS 2000 4WD chassis dyno on site. MAHA make what we consider to be the best rolling-road chassis dynos in the world. Contact us with the vehicle details so we can confirm the right setup.
Llandow Tuning is at Llandow Dyno Centre on Unit 11 Sambucus Avenue, Llandow Trading Estate, CF71 7PB.
Ready to get a measured answer?
Include the registration, drivetrain, modifications and any symptoms. We will help you choose the correct South Wales dyno session.