Low Carbon Footprint Four-Door Sedans

By John Addison. The four-door sedan continues to be a popular vehicle for fleets and for individuals. These sedans often deliver the right amount of space for 4 or 5 passengers and enough cargo space for a taxi. The following 10 four-door sedans have the lowest greenhouse gas emissions per mile of any vehicles available for volume commercial sale in 2009. In many cases, they also have the best fuel economy. Most are already selling in quantity. In a few cases, we are betting that the manufacturer will sell 1,000 to fleets by the end of 2009. Buying these clean cars often gives fleets tax breaks and special funding opportunities.

Reduced greenhouse gas emissions are becoming a priority with fleet managers and millions of conscientious consumers. These Top 10 Low Carbon Footprint Four-Doors are listed from lowest to highest in carbon footprint.

  1. Toyota Prius
  2. Honda Insight
  3. Honda Civic Hybrid
  4. Toyota Camry CNG Hybrid
  5. Ford Fusion Hybrid
  6. Nissan Altima Hybrid
  7. Honda Civic CNG
  8. Toyota Camry Hybrid
  9. Toyota Yaris
  10. Chevrolet Aveo

Fleets are also early adopters of vehicles with even less emissions including electric vehicles, hydrogen fuel cell, plug-in hybrid conversions, and diesel hybrid concept cars. Because these are not offered for commercial volume sale, they are not part of this Top 10 Four-Door Sedan list. Electric and alt-fuel vehicles are also covered in detail at Clean Fleet Report.

The Toyota Prius continues to lead the four-door sedan field in fuel economy and lowest lifecycle greenhouse gas emissions. This perennial favorite midsize is lowest on the list with 4 tons of carbon dioxide equivalent for the EPA annual driving cycle; combined fuel economy is 46 mpg. Yes, 4 tons of CO2e is a lot; by comparison the 2009 Lamborghini Murcielago rates at 18.3 tons and only gets 10 mpg. Sorry fleet managers, you’ll need to take that Lamborghini out of the budget. Watch for new announcements from Toyota at the Detroit and Chicago Auto Shows, including a solar roof option to power accessories and thereby boost mileage. Prius

The new Honda Insight four-door sedan with an Ecological Drive Assist System is expected to be priced for thousands less than the Prius. Honda will start selling the Insight in North America in spring 2009. Honda is setting expectations that mileage will be similar to the Honda Civic Hybrid. Honda Insight

The Honda Civic Hybrid compact rates at 4.4 tons of CO2e for the EPA annual driving cycle and a combined 42 mpg. Civic Hybrid

The Toyota Camry CNG Hybrid was presented to me as a concept car at the LA Auto Show. Should gas prices start climbing as summer approaches, then Clean Fleet Report is betting that Toyota will make this available to fleets. A similar move happened 10 years ago in 1999 when Toyota marketed a CNG Camry to fleet customers in California. Clean Fleet Report makes an unofficial estimate that emissions will be 4.6 tons of CO2e for the EPA annual driving cycle, based on achieving 32 mpg combined. Camry CNG Hybrid

The Ford Fusion Hybrid will be the most fuel-efficient midsize car on sale in the US by next spring, with an EPA certified 41 mpg rating in the city and 36 mpg on the highway. Clean Fleet Report makes an unofficial estimate that emissions will be 4.8 tons of CO2e for the EPA annual driving cycle. The Fusion Hybrid and Mercury Milan Hybrid may travel up to 47 miles per hour in pure electric mode. The Advanced Intake Variable Cam Timing allows the Fusion and Milan hybrids to more seamlessly transition between gas and electric modes. Green Car Congress

Cleanfleet Report with discussion of other Low Carbon Vehicles

If you are planning to buy any four-door sedans, this list may be a good starting point. The focus is on low CO2e emissions and likely commercial availability. Some will need larger sedans, while others will need affordable small cars, including small station wagons and two-doors which are not part of the list. Executives and sales managers that once required luxury sedans may now insist on one of the green alternatives in the Clean Fleet Report Top 10 Low Carbon Footprint Four-Door Sedans for 2009.

John Addison publishes the Clean Fleet Report. His new book, Save Gas, Save the Planet, will be published March 25, 2009.

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