Formula One will delay the introduction of a new engine until 2014 with 1.6 litre V6 turbos to replace the current V8s instead of a proposed four cylinder unit, the governing FIA said on Wednesday.
The decision was agreed unanimously at a meeting of the FIA's Formula One commission in London but must still be approved formally by the FIA World Motor Sport Council.
"We are very happy with the solution," said an FIA spokesman.
"We have had fruitful discussions with all the stakeholders following the last World Motor Sport Council meeting in Barcelona."
The original plans were for 1.6 litre four-cylinder hybrid turbocharged engines to be introduced from 2013. The new V6s will still feature the 'hybrid' systems the FIA wants to come to the fore and help F1 go 'green'.