What is Euro 6?

Euro 6 is legislation that seeks to make cars better for the environment. The legislation sets stringent standards for exhaust emissions, limiting the amount of harmful nitrogen oxide (NOx) gasses and hydrocarbons which can be produced by a road vehicle.

The new Euro 6 regulations set different standards for diesel and petrol cars. For diesel cars, the new cap on the permitted level of NOx emissions has lowered to 80 mg/km, a dramatic drop from the 180 mg/km level required to meet the previous Euro 5 standards. The limit for NOx from petrol cars remains at 60 mg/km, the same as for the Euro 5 standard.

All vehicles produced from 1st September 2015 must meet Euro 6 standards from their introduction date.  This means any vehicles that are newly introduced into the market as a new model.*

Petrol and Diesel Emission Standards Improvement 2000 – 2014

Technical innovations have helped to lower vehicle emissions over the last 15 years. Since 2000, NOx limits for diesel engines have reduced by 84% and particulates by 90%. 

The table below outlines the reductions: 

2000 - Euro 32005 - Euro 42009 - Euro 52014 - Euro 6
CO (g/km)2.30.641.00.501.00.501.00.50
HC (g/km)0.20.560.100.100.10
HC + NOx0.300.230.17
NOx (g/km)
PM (g/km)no limit0.05no limit0.0250.0050.0050.0050.005

Diesel or Petrol Engines: What You Need To Know

Diesel and petrol engines both have emissions that impact on the environment. In recent years, significant investment by the automotive industry has seen the environmental impacts of engines using either fuel reduced. Land Rover is committed to investing in a variety of fuel types to continue this advancement. 

The choice between petrol and diesel is a personal one. You might consider financial factors such as price and running costs, lifestyle factors such as how often you travel and how long your journeys are, or environmental considerations.

- Today, diesel cars deliver around 25% better fuel economy and less CO2 emissions than equivalent petrol counterparts.

- The latest diesel cars are the cleanest in history, with high tech filters capturing hydrocarbons, carbon monoxide and 99% of all soot particles.  

- Since 2002, buyers choosing diesel have saved almost 3 million tonnes of CO2 from going into the atmosphere.

- Diesel engine cars typically have a lower total cost of ownership (factoring in fuel costs, servicing costs, resale value and taxation) than petrol engine cars.

Find the right Land Rover model for you based on emissions, price and fuel type using our comparison tool.

Land Rover’s Diesel Promise

- At Land Rover, we’ve been committed to developing new technologies – such as the Ingenium engine – to make our cars more environmentally sustainable.

- If you buy a diesel vehicle from Land Rover, you can be confident that it is fully compliant with all EU emissions regulations. Our models adopt the latest technology to control urban emissions and help the UK to meet its air quality and CO2 targets. 

- Our advanced selective catalyst reduction (SCR) exhaust after treatment, which features on all 2016 vehicles, will ensure our cars meet EU6 NOx standards. Below, we explain how. 

How will Selective Catalytic Reduction help?

Selective Catalytic Reduction is an active exhaust gas after-treatment system which converts NOx into less harmful gases and water. Jaguar Land Rover has adopted the technology to significantly reduce emissions and comply with the Euro 6 standards outlined above.

A special Diesel Exhaust Fluid (DEF), often referred to as AdBlue®, makes this possible. DEF is an aqueous urea solution (32.5% urea and 67.5% deionized water) that is injected into the exhaust flow. This causes ammonia to be produced, which breaks down up to 98% of NOx into nitrogen and water. Very little DEF is required for this process to be successful.


Benefits to owners: an overview

- Better for the environment. The reduction of harmful gases emitted makes Land Rovers more environmentally friendly.

- Ultra Low Emissions Zone exemption. From 7th September 2020, any diesel car which does not meet EU6 emissions standards will be required to pay £12.50 per day to drive in a new Ultra Low Emissions Zone in central London. 

What else does this mean for you?

In order for the Selective Catalytic Reduction system to work, AdBlue® levels in the car’s special DEF tank must be maintained. 

AdBlue® usage levels are dependent on vehicle and driving style. Please see table beneath as a guide and please refer to your model handbook for more information about your vehicle’s DEF tank. For most drivers, it will be necessary to top up the DEF tank before your next service is due. More information on the best way to do this is provided below.

How will I know if DEF levels are low?

The distance until the next DEF refill can be viewed at any time in the message centre on the dashboard.

Additionally, if low levels of DEF are detected in the tank, you will be given several warnings.  The first alert is shown 1,500 miles before the tank is empty, followed by a second when 930 miles are remaining. A third warning indicates when 515 miles are left and also warns that the DEF tank needs re-filling or the vehicle will not be able re-start when the distance countdown reaches 0.  The final warning indicates when only 100 miles remain.

When the countdown reaches 0 miles, the vehicle will be prevented from re-starting after the next engine switch-off; this is to ensure the vehicles fully complies with the Euro 6 legislation. The engine will only start again when the DEF tank is re-filled.


Approx. Tank Capacity 


Initial Warning of AdBlue®
(1500 miles left)

Range Rover

18 litres

V6 - 1 litre per 560 miles

V8 - 1 litre per 400 miles

V6 - 8100 - 9000 miles

V8 - 5400 - 6000 miles

Range Rover Sport

18 litres

V6 - 1 litre per 560 miles

V8 - 1 litre per 400 miles

V6 - 8100 - 9000 miles

V8 - 5400 - 6000 miles

Range Rover Evoque

14.5 litres

1 litre per 530 miles

5800 - 6500 miles

Discovery (excl Commerical)

17.8 litres

1 litre per 500 miles

7000 - 7770 miles

Discovery Sport

13.7 litres

1 litre per 530 miles

5400 - 6050 miles

*AdBlue® usage is dependant on driving style and supplied figures are indicative only

DEF quality and DEF flow rate are also monitored. A similar warning system will notify you if inferior DEF quality or a DEF system malfunction are detected, starting with a warning explaining the issue that gives you 530 miles to take corrective action. Once again, the car will not start if no corrective action is taken within this mileage period.

How Do I Re-fill The DEF Tank Or Fix A Fault?

There two ways that the DEF levels in your vehicle can be fully replenished outside of service intervals:

- For the convenience, Land Rover Service Plans include complimentary DEF top-ups between service cycles, from either Jaguar or Land Rover approved service centres. 

- Alternatively, please call your local Retailer to arrange a refill to the recommended manufacturer level for £29.99 RRP.* Please see terms below.

If DEF levels are critically low, you can also take direct action and top up yourself, to allow time to schedule a professional replenishment. 

- You will need two JLR-approved AdBlue® refill bottles. These can be purchased from JLR Retailers and come with a unique splash guard filler to aid easy refills. You can purchase AdBlue® from independent auto shops. Please ensure the standard you buy is ISO 22241-1 or DIN 70070. 

- DEF can be stored securely on board the vehicle between temperatures of -11°C and 25°C.

- Your owner’s handbook provides instructions on the top-up procedure. Each Land Rover model has a different entry point for DEF, so please carefully refer to your handbook to find out where yours is.

In the event of a problem detected with DEF quality or DEF flow rate, you must contact your retailer to resolve the issue. 

*Terms and Conditions:

Offer available at participating Land Rover Retailers / Authorised Repairers. Fee for DEF / AdBlue® check and top up to manufacturer fill level is £29.99 RRP per vehicle on a single visit. Eligible on Land Rover vehicles only. Please contact your retailer to book in advance to avoid disappointment.

Which models will this affect?

To comply with EU6 legislation, the Selective Catalytic Reduction system using AdBlue® will be a featured on all diesel-engine models from 2016 onwards. 

*Note: this does not apply to the Defender, which is exempt from EU6 because of Commercial Vehicle Classification.

Glossary and Frequently asked Questions

What is NOx?

NOx is short for Nitrogen Oxides, which are chemical compounds formed from nitrogen and oxygen. Under high temperatures, such as those resulting from the combustion of fuel in air, nitrogen and oxygen undergo a series of chemical reactions, combining to form NOx. 

What Is Diesel Particulate Matter?

Diesel Particulate Matter is a complex mixture of solid and liquid particles suspended in exhaust gases. These particles vary greatly in size, composition, and origin, but primarily consist of very small soot particles, generated during combustion.

How do manufacturers demonstrate compliance with the Euro emissions standards?

Vehicles are regularly tested in a laboratory in accordance with a set of industry-wide legally prescribed procedures in the presence of an independent authority. In addition, manufacturers also have an obligation to periodically test the performance and conformity of newly manufactured cars to ensure that vehicles demonstrate effective emissions control and perform as designed.

I’ve read that vehicles exceed the Euro emissions standards in the real-world. Why is this?

The current industry-wide laboratory testing procedures provide a highly repeatable and standardised approach to measuring the emissions performance of vehicles. However, in practice the conditions experienced in real-world driving – such as environmental conditions, traffic, road speeds and personal driving styles – can be much more variable and can influence the emissions performance of a vehicle.  

The development of the test procedures has not maintained pace with advances in vehicle design and functionality. To address this situation, a new laboratory based test procedure is under development and laboratory testing will be supplemented with a Real-world Driving Emissions test (commonly abbreviated to RDE). The RDE test will require manufacturers to measure the emissions performance of vehicles under real-world conditions.

What are the health effects of diesel? 

The science is still emerging and it is important to note that there are many sources of these pollutants such as particulates and NOx; diesel engines are only one of these. We are confident that the Land Rover vehicles we build today have dramatically reduced the level of emissions they produce. Yet air quality can only be consistently improved in partnership with industry, government, academics and consumers.

What is a Diesel Particulate Filter (DPF)?

All our diesel engines are fitted with a Diesel Particulate Filter (DPF). The DPF forms part of the emissions reduction system fitted to your vehicle. The DPF removes up to 99% of the carbon microspheres (soot) before they leave the exhaust. It does this by filtering out the particles, which are then stored until they are burnt away automatically and the filter is emptied.

I drive in an urban environment. Is this a problem with a diesel? 

Driving in an urban environment is not a cause for concern. Unlike a normal filter, which requires periodic replacement, the DPF has been designed to regenerate, or clean itself, to maintain operating efficiency. This regeneration process takes place automatically while the vehicle is being driven. In some instances e.g. if the majority of your journeys are short or consist of slow speeds the system may not meet the required temperature to allow the DPF to regenerate. In this instance a yellow light will be lit on the driver’s instrument panel. If this occurs, a 20-minute drive at a constant minimum speed of 45mph will ensure the system regenerates.

Jaguar Land Rover Limited: Registered office: Abbey Road, Whitley, Coventry CV3 4LF. Registered in England No: 1672070

The figures provided are as a result of official manufacturer's tests in accordance with EU legislation. A vehicle's actual fuel consumption may differ from that achieved in such tests and these figures are for comparative purposes only.