https://web.archive.org/web/20070428004836/http://www.formula1.com/insight/rulesandregs/13/995.html https://web.archive.org/web/20070428004836/http://www.formul

https://web.archive.org/web/20070428004836/http://www.formula1.com/insight/rulesandregs/13/995.html https://web.archive.org/web/20070428004836/http://www.formul... "For 2006, engines are reduced in size from the previous 3-litre V10s to 2.4-litre V8s. The aim is to reduce costs and improve safety." You can also tell that it's mostly about performance, given all the other design restrictions (no variable valve timing, no intercoolers, just one spark plug, etc ).