BMW essentially struck gold in the compact, two-seater market when it released the Z4 back in 2003. It featured a sporty exterior, with potent, naturally aspired engines, and could be had as a soft-top convertible or in coupe form. That first generation lasted until 2009, but before the first-gen made its exit BMW was able to introduce a Z4 M in both forms with performance credentials good enough to get the little car that could up to 60 mph in as little as 4.8 seconds if you knew how to shift it right. The second-gen came to be in 2009 and, while most of the engine choices were naturally aspirated, one was offered with turbocharged goodness. Within a couple of years, the entire drivetrain lineup went turbo, and BMW hasn’t looked back since. The second-generation model lasted from 2009 to 2016 and, ever since its discontinuance, fans and purists everywhere have begged for the third-gen model – an all-new roadster that’s due for the 2018 model year and has been caught many times testing out in public over the last two years. At the kickoff of Monterey Car Week, BMW decided to release the Concept Z4, a wild interpretation of the upcoming roadster and something that at least gives us a little hint as to where BMW is going with the third-gen model.