5. Honda Insight (1999)
The first-generation Honda Insight was a true trailblazer, becoming the first hybrid car available in the United States. Released in 1999, its lightweight aluminum body, futuristic design, and cutting-edge hybrid technology set new benchmarks for fuel efficiency—decades before hybrids became mainstream. Though its two-seater layout and unusual styling limited its appeal at launch, the Insight’s influence can be seen in every modern hybrid on the road today. Read more about this pioneering vehicle at Car and Driver.