Rankings and measurements
Ranking and Measurement of vehicles on the Green Vehicle Guide
To help keep Australians safe on our roads, the Road Vehicle Standards (RVS) legislation ensures all road vehicles meet safety, security, environmental and anti-theft performance requirements before they are provided to the Australian market for the first time. To do this, road vehicles must meet the applicable national standards, including the Australian Design Rules (ADRs).
Vehicles listed on the Green Vehicle Guide (GVG) website are primarily ranked on the basis of testing conducted by manufacturers in accordance with the ADR for fuel consumption labelling. Testing is conducted by manufacturers as part of the certification processes for vehicles sold in Australia.
Australian vehicle emission standards largely reflect international standards developed through the United Nations World Forum for the Harmonisation of Vehicle Regulations. These standards form the basis of vehicle emission standards adopted in Europe and many other countries, and are commonly known as the "Euro" standards.
The information used in the GVG is supplied directly by vehicle manufacturers. To ensure consistency, the information supplied to the GVG is checked against information supplied to the Department for the ADR certification process. The integrity of information submitted for the ADR certification process is verified through targeted audits by the Department.
Rankings are primarily based on tailpipe CO2 emissions. Like any manufactured product, motor vehicles can have other impacts on the environment. For example the vehicle manufacturing process and the level of recyclability of vehicle components can impact on the environment, as can emissions from the refining of different fuels. Data on these elements is not available from an objective source at an individual vehicle level.
How vehicles are ranked
The main greenhouse gas emitted by motor vehicles is carbon dioxide (CO2). The level of CO2 emissions is linked to the amount of fuel consumed by the vehicle, and the type of fuel used. All new vehicle models up to 3.5 tonnes gross vehicle mass sold in Australia are tested in accordance with ADR in force for fuel or energy consumption labelling. This information is displayed on a Fuel or Energy Consumption Label attached to the windscreen of new vehicles. Externally chargeable (electric and 'plug-in' hybrid) vehicles have an energy consumption label, which also provides information on their electric energy consumption and range. This data, along with information on the vehicle's certified air pollution standard (from the tests performed to display compliance with noxious emissions ADRs) and data provided from the ADR 83/00 stationary noise test is submitted by manufacturers (on a voluntary basis) for publication on the GVG website.
Vehicles published on the GVG website vehicles are then ranked as follows:
In the first instance, vehicles are ranked by combined tailpipe CO2 emissions (lowest to highest). In cases where combined tailpipe CO2 emissions are equal, vehicles are then ranked according to the test-procedure they have declared. In these instances, vehicles tested to the US EPA or 4-Phase WLTP test procedures are ranked highest, followed by the 3-Phase WLTP test procedure, and then NEDC test procedure or no test procedure.
Vehicles are then ranked by urban CO2 emissions (lowest to highest), followed by extra urban CO2 (lowest to highest), energy consumption (lowest to highest), electric range (highest to lowest), air pollution standard (highest to lowest), noise (lowest to highest). Where all results are equal vehicles can then be ranked in alphabetical order (by make (A-Z), model (A-Z) and variant (A-Z).
About the Testing Procedure
All vehicles are tested using a test procedure (drive cycle) under carefully controlled conditions in specialised vehicle emission laboratories. The test methods used for determining exhaust emissions and fuel consumption are specified in the ADRs.
The ADRs adopt the test methods from the relevant regulations adopted through the United Nations World Forum for the Harmonisation of Vehicle Regulations .
The Australian Government has implemented more stringent (Euro 6d equivalent) noxious emissions standards for light vehicles (up to 3.5 tonnes GVM), which mandate a new test procedure.
To help distinguish the test procedure a vehicle is reporting values from, a new field has been added to the GVG from 2026. Vehicle data supplied before this date may not distinguish the test procedure used.
However, no test can simulate all possible combinations of conditions that may be experienced on the road. Real world emissions and fuel consumption may vary from the results provided in the Green Vehicle Guide, depending upon a number of factors including driving and road conditions, driver behaviour and the condition of the vehicle.