Formula One will switch to turbocharged four-cylinder engines from 2013, the FIA has revealed.

The new 1.6-litre engines will replace the current 2.4-litre V8s as part of F1’s drive to improve economy and lower emissions.

Alan Henry blog: F1 set for radical changes in 2013

The turbo units, which last appeared in F1 back in 1988, will be limited to 12,000rpm although an extended use of KERS systems should keep power at current levels. Economy should improve by around 35 per cent.

Teams will only be allowed five engines per season from 2013, and this will be reduced to four from 2014. Gearboxes will have to last five races, not the four at present.

The FIA has also removed the rule banning team orders from 2011, although teams can still be charged with bringing the sport intro disrepute.