System 80 Speed Limiter for Commercial Vehicles
The proven mechanical speed limiter that works on the vehicle's fuel line. Robust, reliable, and trusted worldwide for decades.
Key Features
Pure Mechanical Operation
No electronics, no software, no CAN bus dependency. The System 80 is a mechanical speed limiter that works on the vehicle's fuel line.
Cable Throttle Specialist
Designed specifically for vehicles with traditional Bowden cable throttle systems. The industry standard for pre-electronic commercial vehicles.
Proven in 50+ Countries
The most widely deployed mechanical speed limiter in the world. Trusted by fleet operators across Europe, Middle East, Africa, and Asia for over 40 years.
Minimal Maintenance
Robust construction with minimal moving parts. No firmware updates, no calibration drift, no battery to replace. Predictable service intervals.
The System 80 is AutoKontrol’s flagship mechanical speed limiter. It works on the vehicle’s fuel line, not on an electronic throttle signal, and is the most widely deployed mechanical speed control device in the commercial vehicle sector worldwide. Engineered for simplicity, built for durability, and trusted by fleet operators in over 50 countries for more than 40 years. In the UK, it is fitted at your premises by our nationwide network of approved installers.
How the System 80 Works
The System 80 operates on a purely mechanical principle: it works on the vehicle’s fuel line. Fitted to the fuel line of a mechanically controlled engine, it physically restricts the fuel supply once the vehicle reaches the preset speed limit, so the driver cannot exceed the set speed regardless of pedal pressure.
Unlike electronic speed limiters that rely on software, CAN bus signals, or engine ECU communication, the System 80 has zero electronic dependency. There is no software to crash, no firmware to update, no battery to replace, and no CAN bus compatibility to worry about. It works on day one and continues working for the life of the vehicle.
The speed limit is set during installation using a calibrated adjustment mechanism, then sealed with a tamper-evident seal. The set speed cannot be changed without breaking the seal - providing a visible, physical deterrent to tampering that enforcement officers can verify at a glance.
Why Choose the System 80
Unmatched Reliability
With no electronic components, the System 80 is immune to the electrical failures, water ingress, vibration damage, and software glitches that can affect electronic speed limiters. It operates in extreme heat, extreme cold, dust, and wet conditions without degradation. This makes it the preferred choice for vehicles operating in harsh environments - construction sites, quarries, mines, agricultural land, and developing markets with limited technical support infrastructure.
The Simplest Installation
A trained installer can fit a System 80 in around 60 minutes on most vehicles. The installation requires no specialist diagnostic equipment, no laptop, no CAN bus configuration, and no ECU programming. The unit is fitted to the vehicle’s fuel line - a straightforward mechanical procedure that any competent vehicle technician can perform.
Lowest Total Cost of Ownership
No firmware updates. No annual software licences. No calibration drift requiring recalibration visits. No battery replacements. The System 80’s maintenance requirement is limited to periodic inspection of the fuel line installation and tamper seal - typically aligned with the vehicle’s existing service schedule. For fleet operators managing hundreds or thousands of vehicles across multiple countries, this simplicity translates directly into lower operating costs.
Globally Certified
The System 80 is type-approved under EU/ECE Regulation R89 and holds certifications from UTAC (France), TÜV (Germany), and VCA (United Kingdom). These approvals are recognised by enforcement agencies across Europe, the Middle East, Africa, and Asia - making the System 80 a single product that can be deployed across an international fleet without requiring different hardware for different territories.
Technical Specifications
| Specification | Detail |
|---|---|
| Operating Principle | Mechanical, works on the vehicle’s fuel line |
| Engine Type | Mechanically controlled engines (no electronic throttle) |
| Speed Setting Range | 20-120 km/h (adjustable at installation) |
| Speed Accuracy | ± 1-2 km/h at set speed |
| Power Supply | None required (purely mechanical) |
| Operating Temperature | -40°C to +85°C |
| Tamper Protection | Tamper-evident seal with unique serial number |
| Certifications | EU/ECE R89, UTAC, TÜV, VCA |
| Mounting | On the vehicle’s fuel line |
| Typical Installation Time | 60 minutes |
| Warranty | 2 years manufacturer’s warranty |
| Designed & Manufactured | Chorley, Lancashire, UK |
Installation Process
1. Vehicle Survey
Our approved installer assesses the vehicle’s fuel system, fuel line routing, and mounting points. A speed test confirms the vehicle’s unrestricted top speed and identifies the optimal limiter position.
2. Unit Fitting
The System 80 is fitted to the vehicle’s fuel line. The unit’s mounting bracket is secured to the vehicle chassis or bulkhead.
3. Speed Calibration
The installer sets the maximum speed using the System 80’s calibrated adjustment screw. The vehicle is road-tested to verify the set speed matches the required limit (typically 56 mph / 90 km/h for UK HGVs).
4. Sealing & Certification
A tamper-evident seal with a unique serial number is applied. The installer issues a speed limiter certificate confirming the set speed, seal number, vehicle registration, and date of installation. This certificate is required for DVSA compliance checks.
Who Uses the System 80
The System 80 is the speed limiter of choice for:
- Developing market fleets where electronic infrastructure and diagnostic support are limited
- Construction and plant vehicles operating in harsh, dusty, or wet environments where electronics are vulnerable
- Older commercial vehicles with mechanically controlled engines that predate electronic throttles and CAN bus technology
- Agricultural vehicles required to comply with speed limits on public roads
- Budget-conscious fleet operators who need reliable speed compliance without the cost of electronic systems
- Mixed fleets where some vehicles have mechanically controlled engines and others have electronic throttles - the mechanical System 80 covers the older vehicles while the electronic DBW speed limiter covers the electronic-throttle vehicles
System 80 Fitting in the UK
In the UK, the System 80 is fitted by our approved mobile installers, part of SGH Connect, the Scorpion Group’s national installation network, at your depot, yard or premises. See our speed limiter installation guide and UK fitting coverage, or compare the full speed limiter range.
Frequently Asked Questions
Can the System 80 be fitted to any vehicle?
The System 80 is designed for older vehicles with mechanically controlled engines, where it is fitted to the vehicle’s fuel line. It is not an electronic limiter, so it is not the right product for vehicles with an electronic (drive-by-wire) throttle - for those, see our DBW Speed Limiter.
How tamper-proof is the System 80?
The System 80 uses a physical tamper-evident seal. Unlike electronic systems where tampering may be invisible, any attempt to modify or bypass the System 80 requires breaking the seal - which is immediately visible to enforcement officers, MOT testers, and fleet managers during routine inspections.
What maintenance does the System 80 require?
Minimal. Periodic inspection of the fuel line installation, mounting bracket, and tamper seal - typically during scheduled vehicle servicing. There are no batteries, software updates, or electronic components to maintain.
Is the System 80 still relevant for modern fleets?
Absolutely. While new vehicles increasingly use electronic throttle systems, millions of vehicles with mechanically controlled engines remain in active service worldwide - particularly in construction, agriculture, developing markets, and older fleet vehicles. The System 80 remains the most cost-effective, reliable solution for these vehicles.
Compatible Vehicles
Ideal For
Older cable-throttle vehicles
Developing market fleets
Plant and construction vehicles
Budget-conscious fleet operators
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