engine achieves this compression ratio with ordinary unleaded gasoline (95 RON in the United Kingdom) through improved scavenging of exhaust gases (which ensures cylinder temperature is as low as possible before the intake stroke), in addition to direct injection.
* Toyota Dynamic Force engine has a compression ratio up to 14:1.
* The 2014 Ferrari 458 Speciale also has a compression ratio of 14:1.

When forced induction