The FIA has confirmed a reduction in F1 engine capacity for 2013.
The World Motor Sport Council met today to approve the changes to the engine rules.
F1 teams have been required to use 2.4-litre V8 engines since 2006. There will be replaced by 1.6-litre, four-cylinder units.
The number of engines each driver may use per season will also be reduced.
A statement released by the FIA said:
The WMSC approved the introduction of a new specification engine from 2013, underlining the FIA?óÔé¼Ôäós commitment to improving sustainability and addressing the needs of the automotive industry.
Following dialogue with the engine manufacturers and experts in this field, the power units will be four cylinders, 1.6 litre with high pressure gasoline injection up to 500 bar with a maximum of 12,000 rpm.
The engines will deliver a 35% reduction in fuel consumption and will feature extensive energy management and energy recovery systems, while maintaining current levels of performance.
In 2013, five engines will be permitted per driver, but each year after that the limit will be four.