DIesel Tuning

More power, better economy, and full flexibility — with modes that adapt to your driving at the touch of a button.

Power When You Need It

Experience stronger acceleration, improved torque, and smoother driving — perfect for towing, hauling, or long-distance travel.

Switchable Modes

Easily change between performance, economy, and balanced settings. Total control, tailored to your journey.

Professional Install. Backed by Warranty.

All tuning is carried out by our certified team and installed with precision. Every system comes with a 5-year warranty,.

Advantage 3 Diesel Tuning – Premium Power with Total Flexibility

At Automotive Developments, we only fit what we trust. The Advantage 3 by Tunit is the result of 20+ years of engineering, offering powerful performance boosts and economy improvements with the peace of mind of long-term support. It’s our go-to diesel tuning solution—smart, safe, and built for the long haul.

Performance Your Way

We work with you to optimise for power, efficiency, or a balance of both—tuning your van to match your driving style.

Happy Clients
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Performance Tuning

Diesel Tuning Packages

Professional installation with custom tuning and full support.

Tunit Power Pedal Pro

Adapt your throttle response to suit you

from £258.00

Tunit Advantage 3

More Power, Better Economy

from £510.00

Key Benefits

Increased BHP & Torque
Fuel Savings (Avg. 12%)
Adjustable Power (Levels 0–9)
Dealer-Level Bespoke Tuning
Easy Installation with OEM Plugs
2-Year Engine Warranty
5-Year Product Warranty
Lifetime Part Exchange Scheme (Tunit for Life)

Talk to an Expert

Year of Experiences
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Conversions
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Diesel Tuning in Liverpool, Merseyside &
Across the UK

From our Liverpool workshop, we work with customers across the Wirral, Cheshire, the North West, and nationwide. With Advantage 3 Diesel Tuning, we deliver premium performance upgrades that improve power, torque, and efficiency — all with total flexibility.

Our tuning solutions are fully customisable, giving you the ability to switch between different driving modes at the touch of a button. Whether you need maximum performance for towing, improved economy for long journeys, or a balance of both, our system adapts to your driving style and needs. Installed by experienced technicians, every tune is carried out with precision and care, ensuring safe, reliable results you can trust.

We are trusted by hundreds of van enthusiasts and
businesses across the UK

Frequently Asked Questions

Most Advantage 3 installations can be completed in a few hours, depending on your vehicle.

Yes — the Advantage 3 system allows you to change settings easily, giving you full control over performance and economy.

Absolutely. Our tuning is carried out to industry standards, ensuring reliability and compliance with manufacturer tolerances.

Yes — many customers see improved fuel efficiency, especially when using the economy mode for longer drives.

Let’s Talk Diesel Tuning

Get in touch with our friendly team today—we’ll walk you through the process and provide a personalised quote to suit your build.