The M8 Light Armored Car (called the Greyhound by the British) was a 6x6 armored car made by the Ford Motor Company for use by US and British forces in Europe and East Asia. It was originally intended to be a fast wheeled tank destroyer, but by the time it was ready for action in 1943 it was obvious that its 37mm gun was just too light to do much harm to the German tanks it'd be going against, so instead it was designated as a light armored car and its role was reconnaissance. In addtion to the primary gun, the crew of four also had a coaxial .30 caliber machine gun in the front hull and a .50 caliber M2 Browning in a ring mount. On paved highways the M8 could reach sustained speeds of up to 55 miles per hour and could drive for about 300 miles without refueling. Its performance was poor, however, in wooded areas, broken terrain, mud and snow, and the Cavalry Recon were said to prefer the Jeep in those situations. The M8 was powered by an 86HP Hercules JXD 6 cylinder gas engine. 8,523 M8s had been produced when production stopped in May of 1945.
Doyle, David. U.S. Military Vehicles Field Guide. Iola, WI: KP Books, 2005.
"M-8 Armored Car." Olive-Drab.com. May 22, 2008. Oct. 13, 2012. http://www.olive-drab.com/idphoto/id_photos_m8.php3