The first BMW M5 appeared in the United States during the 1988 model year and was sold for only one year. It offered 256 horsepower from a six-cylinder motor that it shared with the M6. Three years later, the second-generation M5 hit U.S. shores, once again using the same basic six-cylinder engine but with modifications to make 310 horsepower. BMW’s official 0-60 acceleration time for the car was 6.1 seconds. The turn of the century marked the third-generation M5 as it went on sale for the 2000 model year. This M5’s motor was a breathed-on 4.9-liter V8 that produced 394 horsepower and propelled the M5 from 0-60 in 4.8 seconds. The latest version hitting the streets for 2006 once again steps things up with a new V-10 engine producing 500 horsepower and 383 lb.-ft. of torque and a whole assortment of technological goodies.