[Goat Blower]

It's actually not too tough. The three main styles are the 3,5 and 7 series. Basically from smallest to largest, and the first number in the name. In certain years there was also a 6 series and an 8 series, both only come as a 2-door, 6's can be a convertible. The second two digits is the relative engine size. 23 is a 2.3l, 30=3.0l and so on and so forth. They are not always right on since engine sizes grew through the years, but they are close. The 4.0 is a V8, the 5.0 is a V12. M's are the souped up versions of each. The Z is the smaller sporty convertibles and the X is the SUV's, the fastest of which is the 4.8is, which really flies.