If you have even a passing interest in vintage Japanese cars, this machine needs no introduction. The number 46 BRE Datsun 510 is perhaps the poster child for racing underdogs. When it first hit the SCCA Trans Am scene in the early '70s, it lined up against several storied marques. It took lots of wrench time and plenty of determination, but the BRE team pushed to two national championship wins against rival Alfa Romeo in 1971 and 1972. Race cars have evolved at about the same clip as telephones in the last 30 years, but there's still something special about watching this machine tackle a race course.

Road & Track recently turned to Indycar driver Alex Lloyd to get his interpretation of what makes this particular car so important. The sound quality in the video below could certainly use some love, but we'll never turn down the excuse to burn 12 minutes of our work day watching this machine eat up some tarmac in Memphis. Check out the video for yourself below.