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McLaren and Porsche beat Smart on CO2

  • McLaren and Porsche outdo Smart on CO2
  • Find out how in our video
  • but don't think that they're greener
Words ByWhat Car? Staff

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You might not think that the high-performance McLaren MP4-12C and Porsche Panamera can outdo the Smart ForTwo diesel in a CO2 race, but they can, even though the ForTwo diesel has the lowest CO2 of any car on sale at 86g/km.

Find out how in our video.