현재까지 수많은 경쟁차가 있었지만 아무도 도요다의 Prius를 그린카 경쟁에서 이기지를 못했다. 그러나 여기 Ford Fusion hybrid 가 있고, USA Today가 Prius 보다도 극찬을 했다. 아래 리스트는 AutoblogGreen이 열거한 차종들이다. 참고로 여기에 옮겨 놓았다. 
Fiat 500's start&stop technology will be greener than expected 

- Fusion hybrid vs Prius? USA Today picks the Ford
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 - USDA and EPA talking about raising ethanol blend in gasoline
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 - All aboard the Aptera tour with co-founder Steve Fambro
 - Study: Ethanol no better than gas
 - Geneva Preview: Honda may intro diesel-powered Accord Type S
 
Fiat 500's start&stop technology will be greener than expected