The McLaren MP4-12C is about as close as one can get to a Formula 1 racer in a production, road-going sports car--and what makes the 12C all the more attractive is that it's versatile and comfortable enough for daily driving.
McLaren boasts that the 12C's engine has among the highest ratio of power output to CO2 (emissions) output--making it extremely efficient and eco-friendly considering its performance.