While we all understand the green benefits of pouring ethanol in our tanks, the folks at Saab realized one of its drawbacks — it only has 75% of the potential energy of gasoline, leaving gunning-hungry drivers needing 20% more to keep up the horsepower.
Standard ethanol is a 85/15 ethanol/gasoline blend, and Saab realized its high octane rating — 110 — would work with a turbocharger. It created the BioPower engine, the first ethanol turbo. The engine runs with both gasoline and ethanol, but when it runs on gasoline it only gets 148 horsepower, and on ethanol it gets up to 184.
What's it all mean? If you want to start gunning green, you'll be able to get up to 140 mph, but the car's still a bit heavy on the checkbook at $35,000.