Click above for hi-res gallery of the '89 BMW M5 cabrio

These days BMW's M division is pretty busy, cranking out all manner of sport-tuned models in every form. You can get an M3 as a coupe, convertible or sedan, the M5 in sedan or wagon form, and the M6 as either a coupe or a convertible, in addition to M versions of the Z4. But back in the late '80s, the selection of M cars was much more limited. Not that the engineers in the sporting division weren't trying, though. Case in point is this M5 cabrio prototype that almost made it into production, but was canceled at the last minute.

Click to view a hi-res gallery of the BMW M3

Ever meet one of those parents who are never satisfied no matter how well their kids do? The child comes home with a 98% on a school exam and the parent asks "How'd you lose two percent?" Dinan is one of those parents. But instead of overstressed children, Dinan produces overachieving performance automobiles.

Click above for high-res gallery of 2009 MY changes

BMW's lineup of M-fortified vehicles now numbers nine, which is the largest it's ever been in the sub-brand's 30-year history. Munich has tweaked the lineup for 2009, and while nothing groundbreaking has been added, the additions and changes are worth noting. For instance, the BMW M3 Sedan gets a new rear end that sports updated taillights with two LED light clusters, and the entire M3 line gets some minor interior tweaks, new colors and crash-active headrests. The M5 and M6 soldier on with larger sideview mirrors, though BMW mentions that regenerative braking and an uncoupling air conditioner compressor - both fuel saving technologies - are right around the corner.

The BMW 6-Series is a lot of car, and while the 5.0-liter V10 in the M6 does a remarkable job of moving it around, critics have said it could use some help. Reports now indicate that the M division is giving it some help in the form of a new Competition Package.

Click above for high-res gallery of BMW's latest M3