15 Ultra-Efficient Vehicles Left in the Automotive X Prize Competition

The race to design and build a production-capable vehicles that exceed 100 Miles per gallon (or energy equivalent MPGe) is in full gear this summer as scores of ultra efficient vehicles compete in the <a href="http://inhabitat.com/2008/03/25/10-million-dollar-x-prize-for-greener-100mpge-car/" target="_blank">Progressive Automotive X-Prize competition</a>. After months of trials, races and multi-stage testing the knockout stage just ended, leaving 15 of the original 26 cars still standing. The 15 vehicles in three different classes will continue on to compete in further trials to determine which vehicle really has what it takes to be the most efficient vehicle around. Read on for a roundup of the incredible fuel-efficient cars moving on to the final stages!

<h3>Edison2 - Very Light Car</h3> </br> Edison2 has a number of cars competing, with two in the Mainstream Class. VeryLightCar1 has a combustion engine that runs on E85 fuel. It has achieved a fuel efficiency of 67.3 MPGe with a range of 150 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/edison2" target="_blank">+ Edison2</a>

<h3>Edison2 - Very Light Car 4</h3> </br> Edison2's other Mainstream Class vehicle is the VeryLightCar4, which has a combustion engine, runs on E85 fuel, and achieved a fuel efficiency of 80.3 MPGe and a range of 138 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/edison2" target="_blank">+ Edison2</a>

<h3>Edison2 - Very Light Car Tandem</h3> </br> Edison2's VeryLightCar is competing in the Alternative Tandem Class. It has a combustion engine, runs on E85 fuel, and achieved a fuel efficiency of 90.6 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/edison2" target="_blank">+ Edison2</a>

<h3>Spira - Spira4u</h3> </br> Spira has entered a crazy-looking little mobile decked out in red, white and blue in the Alternative Tandem Class. The Spira4u has a combustion engine and runs on gasoline and achieved a fuel efficiency of 75.4 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/spira" target="_blank">+ Spira</a>

<h3>X-Tracer - E Tracer 7002</h3> </br> X-Tracer has two vehicles in the Alternative Tandem Class. The E Tracer 7002 is a battery-powered electric vehicle that achieved a fuel efficiency of 180 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/xtracer" target="_blank">+ X-Tracer</a>

<h3>X-Tracer - E Tracer 7009</h3> </br> The E Tracer 7009 is a battery electric vehicle and achieved a fuel efficiency of 171.6 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/xtracer" target="_blank">+ X-Tracer</a>

<h3>Amp - amp'd Sky</h3> </br> Amp's sexy-looking sportscar is in the Alternative Side-by-Side Class. The amp'd Sky is a battery electric vehicle and achieved a fuel efficiency of 73.8 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/amp" target="_blank">+ Amp</a>

<h3>Aptera - Aptera 2e</h3> </br> Aptera's sleek green and white three-wheeled vehicle is in the Alternative Side-by-Side Class. The Aptera 2e is a battery-powered electric vehicle that achieved a fuel efficiency of 112.3 MPGe and a range of 70 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/aptera?carId=119" target="_blank">+ Aptera</a>

<h3>Li-Ion Motors - Wave II</h3> </br> Li-ion Motors entered another sleek green vehicle in the Alternative Side-by-Side Class. The Wave II is a battery electric vehicle and achieved a fuel efficiency of 182.3 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/li-ionmotors" target="_blank">+ Li-ion Motors</a>

<h3>RaceAbout Association - RaceAbout</h3> </br> <a href="http://inhabitat.com/2010/04/06/finland-unveils-raceabout-all-electric-supercar/">RaceAbout Association's super hot car</a> is in the Alternative Side-by-Side Class. The RaceAbout is a battery electric vehicle and achieved a fuel efficiency of 128.1 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/raceabout-association" target="_blank">+ RaceAbout Association</a>

<h3>Tata Motors - Indica Vista EV X</h3> </br> Tata Motors has a practical little sedan is in the Alternative Side-by-Side Class. The Indica Vista EV X is a battery electric vehicle and achieved a fuel efficiency of 134.3 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/tata-motors-limited" target="_blank">+ Tata Motors</a>

<h3>Western Washington University - Viking 45</h3> </br> Western Washington University's retro-looking car is in the Alternative Side-by-Side Class. The Viking 45 is a hybrid gas/electric vehicle and achieved a fuel efficiency of 82.3 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/western-washington-university" target="_blank">+ Western Washington University</a>

<h3>Zap - Alias</h3> </br> Zap, a US electric vehicle maker, has a car in the Alternative Side-by-Side Class. The Alias is a battery electric vehicle and achieved a fuel efficiency of 87.5 MPGe and a range of 68 miles in the Knockout Stages. </br> <a href="http://www.progressiveautoxprize.org/teams/zap" target="_blank">+ Zap</a>