We will be sharing new fuel consumption figures based on the new European fuel consumption test, the WLTP driving cycle (Worldwide Harmonized Light Vehicles Test Procedure). By testing cars with extra optional equipment and across a greater range of driving profiles, we can give you fuel consumption figures that are a closer representation of real-world driving behaviour than the current fuel consumption test, the NEDC.

WLTP Driving Cycle

Below are figures showing the range, in miles per gallon (MPG), for the NEDC and for the new WLTP driving cycle test. Regarding WLTP driving cycle figures, the lowest value represents the lowest MPG recorded during the four phases of the WLTP driving cycle, with a vehicle fitted with optional equipment offering the maximum fuel consumption for the given engine and transmission combination – this could be larger wheels, optional extras and the least economical driving phase of the test. The highest value represents the greatest MPG recorded during the test with a vehicle fitted with the optional equipment offering the minimum fuel consumption for the given engine and transmission combination.

The vehicle fuel consumption or performance won't change with these new figures, the change in figures is due to a change in how the vehicles are tested. From Autumn 2017, all car manufacturers will have to test using WLTP driving cycle and publish this data.

MORE TRANSPARENCY

Closer figures to daily consumption

* According to Regulations (EC) No 715/2007 and (EC) No 692/2008 (in the version currently applicable.). The figures do not refer to a specific vehicle and are not part of a specific offer but serve purely for comparing various types of vehicles. Fuel consumption figures can be found in the engine/transmission stage of the Vauxhall configurator. For Astra 5-door hatchback please see here and for Astra Sports Tourer please see here.

 

** The upper value represents the highest measurement taken from the four phases of the WLTP cycle, using the fuel consumption of a vehicle with the most economical vehicle equipment of the relative engine and transmission combination. The lower value represents the lowest measurement of the four WLTP cycle phases, taken from the corresponding fuel consumption of the most fuel-intensive equipped vehicle.

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  • HOW YOU BENEFIT

    What does it mean for you?

     

    The new WLTP driving cycle takes into account the situations that you see every day. So if you need to estimate your daily consumption, you’ve got a much more accurate method than the current NEDC standard.

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  • WHAT IS THE WLTP DRIVING CYCLE?

    The WLTP driving cycle is made up of several phases, which are based on the everyday driving profiles of motorists from around the world.

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  • SAVING FUEL MADE EASY

    Fuel consumption can be affected by a number of things but did you know that with a few simple steps you could reduce your consumption by up to a third?

     

    Find out more

  • TIP 1:

    SAVE ON WEIGHT TO SAVE ON FUEL

    If possible, only pack the essentials in your car. Keeping things in your car which you don't need on your journey adds weight, which uses more fuel. If you aren't using the roof rack and rear carrier, take these off to save weight and wind resistance.

    TIP 2:

    No need to warm up
    your engine

    Modern engines don't need warming up – it just consumes fuel unnecessarily. It's better to just get in and go.

  • TIP 3:

    MOVE UP A GEAR EARLIER

    Changing up a gear early is a simple way to save fuel. If you're pulling away at a green light, shift to 2nd after you've moved a car length. It'll save you even more.

    TIP 4:

    SAVE ON ELECTRICITY

    Electronic extras often use lots of energy. So use air conditioning, seat heating and other electric equipment with care. Small things help, like parking in the shade and cross-ventilating your car when it's hot.

  • TIP 5:

    GO WITH THE FLOW

    Braking and accelerating too often also increases fuel consumption. So it's best to look ahead and adapt to the traffic flow to avoid using the pedals unnecessarily.

    TIP 6:

    No need to rush

     

    On the motorway, patience pays off. Raising your speed increases fuel consumption and empties your tank much faster.

  • TIP 7:

    Give your car a break

    If you have to stop for longer than 10 seconds, it's worth switching off the car to save fuel. Many Vauxhalls already have an automatic start/stop mechanism to make this easier.

    TIP 8:

    Keep up to date with
    car maintenance


    You should service your car in-line with the recommended schedules for your car (this is listed in your owners manual) and perform regular checks yourself. Remember, don't drive with low tyre pressure - it increases rolling resistance and uses more fuel. Find your recommended tyre pressures in your owners manual.

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  • OVERVIEW

  • TIPS 1 & 2

  • TIPS 3 & 4

  • TIPS 5 & 6

  • TIPS 7 & 8

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FAQs

Why is the NEDC out of date?

The NEDC (New European Driving Cycle) was introduced in 1992. But since then, cars, roads and driving behaviour have changed quite a bit. It’s is an artificial laboratory test and serves exclusively to compare different vehicles, not to reflect day-to-day driving and fuel consumption. This means that real consumption today is often very different from the NEDC information. The main reasons include:

 

  • The theoretical driving profiles it uses don’t match real user profiles.
  • Insufficient acceleration.
  • Too many stop phases.
  • It doesn’t incorporate higher speeds. This sets the average speed too low.
  • Gear shifting points are broadly defined by transmission type. So they are the same for all cars with manual transmission.
  • Optional equipment is not being taken into account.
What does the NEDC measure?

The NEDC is an artificial laboratory test that serves exclusively to compare the fuel consumption of different vehicles. But it doesn’t reflect the fuel consumption of day-to-day driving. This means that real consumption today is often very different from the NEDC information. The main reasons include:

 

  • The theoretical driving profiles it uses don’t match real user profiles.
  • Insufficient acceleration.
  • Too many stop phases.
  • It doesn’t incorporate higher speeds. This sets the average speed too low.
  • Gear shifting points are broadly defined by transmission type. So they are the same for all cars with manual transmission.
  • Optional equipment is not being taken into account.
How does the NEDC work?

The NEDC is based on a theoretical driving profile and consists of two parts. In the first 13 minutes, it simulates a drive in city traffic with many stop-and-go phases. The second part corresponds to an extra-urban journey at a maximum speed of 120 km/h, almost 75 mph.

What are the four parts of the WLTP?

In order to determine consumption values more realistically, the WLTP driving cycle is based on a global statistical survey of real driving profiles. It includes four parts with different average speeds: low, medium, high and extra high. Each phase includes different amounts and degrees of acceleration, braking and stopping, all to simulate everyday driving.

What is the difference between NEDC and WLTP?

Since the introduction of NEDC in 1992 cars and driving styles have changed quite a bit. The WLTP test parameters have been redefined to reflect real conditions more closely. They now include:

 

  • Longer cycle times (30 min vs 20 min)
  • Shorter stopping times (13% vs 25%)
  • Longer distances (about 23 km/14 miles vs 11 km/6 miles)
  • Higher speeds (max. 130 km/h / 80 mph vs 120 km/h / 75 mph)
  • Almost 50% higher average speeds
  • Higher maximum acceleration and more acceleration phases
  • Approximately 20-30% higher driving power based on the more dynamic driving situations
  • More realistic determination of driving resistance for fuel consumption tests
  • Consideration of optional equipment in the vehicle


The values obtained with WLTP are comparable worldwide, while the NEDC values are only valid in Europe.

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While the current NEDC determines urban, extra-urban and combined values based on a theoretical driving profile, the WLTP uses real driving profiles drawn from a global survey.

 

The WLTP driving cycle is divided into four parts with different average speeds: low, medium, high and extra high. Each part contains a variety of driving phases, stops, acceleration and braking phases, etc. They represent everyday driving profiles. Each engine and transmission combination is tested with the most economical as well as the most fuel-intensive vehicle equipment.

 

Starting with the Astra, we’ll test each and every model. The values we will share define a range from the lowest to the highest consumption for each engine and transmission combination. It will give a good indication of the expected daily consumption of each model.

 

Please note: The values based on the WLTP driving cycle are determined using a standardised, predefined drive cycle on a test rig.

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The consumption values you’d find in the New European Driving Cycle (NEDC) are precise and easy to compare with other models, but they aren’t perfect. Since the NEDC was made legally binding in 1992, the cars we drive have changed and so has the way we drive them. So to take the new conditions into account, the test parameters have been redefined in the Worldwide Harmonized Light-Duty Vehicle Test Procedure (WLTP).

 

They now take into account:

 

  • More realistic driving behaviour and outside temperatures
  • Greater test distances
  • Higher average and maximum speeds
  • Shorter stops
  • More braking and acceleration

 

The influence of optional equipment also plays a role in the WLTP driving cycle. This new driving cycle will be legally binding for all automobile manufacturers from autumn 2017.