Learn all about The 6 vs 8 Showdown, watch the four competitors climb Loveland Pass and see the challenge from the drivers’ point of view.

Lost in-car video of a 08 BMW M3 DCT lapping Mazda Raceway Laguna Seca in our 2008 Best Handling story. Read more here: http://www.motortrend.com/features/performance/112_0810_americas_best_handling_car_track_testing/index.html

Hennessey’s 600+ horsepower Camaro HPE550 takes on Ford’s Shelby GT500 and Dodge’s Challenger SRT8 in a ¼ mile drag race.

The police will be getting a Caprice — the all-new Chevrolet Caprice Police Patrol Vehicle. Unedited video courtesy of GM.

You wanted to see the SRT8 and GT500 throw down with a Camaro “Z/28”? You got it…sort of. The Camaro in this test isn’t a Z/28 since Chevy hasn’t officially made one, but the next best thing – a Hennessey-built Camaro with over 600 horsepower dubbed the HPE550. Can this Z/28 imitation take back the muscle car crown from the GT500 and SRT8?

By scrounging up some of its best performance hardware, Chevrolet managed to cobble up a new car that just might be cool enough to warrant resurrection of the storied Grand Sport moniker.

Senior Editor Edward Loh tries to figure out the purpose of the 2009 Spyker Aileron by drivng it along some winding roads and then taking it to the track for some hot laps.

Watch as Hennessey’s 645 horsepower HPE700 Camaro runs the dyno. Powered by the ZR1’s supercharged LS9 powerplant, this ultimate Camaro will only be produced in limited quantities.

Footage courtesy of Hennessey Performance Engineering

Take a look behind the scenes with Jay Leno and pro race driver Justin Bell as they preview the Green Car Challenge debuting on The Jay Leno Show