At the first Audi Club track event I went to, I excitedly hurried my 4000CS quattro through the hills of Northwest Connecticut to Lime Rock Park. The year was 1997, and while I had been heading to the track for many years this was my first foray to an Audi event. Back in ’97, old Audis were pretty uncommon – hard to fathom considering how scarce they are today. So going to an all-Audi event promised to be a special collection of audacious Audis, and I was certainly not disappointed. There were no less than ten Quattros in attendance, and may have even been more – I struggle a bit to remember, but a fair chunk of the instructor core had them and even a few students showed up with the legendary cars. It was a bit like those nature shows of Ridley Sea Turtles arriving on Mexican beaches once a year to lay eggs; a baffling display of the entire world’s population arriving in one spot at one time when for the rest of the year they’re spread around the world’s oceans. Quattros, especially large numbers of Quattros, are like that. Let’s put some figures into perspective – E30 M3s are rare, right? Sure, only around 5,000 made it to the U.S. with a pretty good amount still being sold on eBay today being driven as they should. 190E 16V owners enjoy pointing out that their cars are much more endangered, as just shy of 2,000 made the Atlantic crossing. Low residuals mean a lower percentage of those original 1,953 still are dog-legging around. E24 M6, E28 M5, E34 M5? Sure, all very low production cars. But the Quattro? 664 came here, and how many are left today is a good question. I’d estimate the number of Quattros remaining alive and in good condition to likely be less than 2/3rds of the original 664 – figure maybe 400 are still around and serviceable. Think about the last time you saw an E30 M3 cruising along down the road (it doesn’t count if you own one or were at a show)? You’re at least ten times less likely to happen across a Quattro. Finally, they’re starting to be appreciated for their special nature, but they’re certainly still critically endangered in the U.S.: