Porsche has been offering high-performance versions of the 911 since the early 1970s, with the most iconic model being the Carrera 2.7 RS. But once the Germans adopted turbocharging, the traditional RS stepped down, making room for a new range-topping sports car, the 911 GT2. First introduced in 1993, the GT2 is now in its fourth generation, which is based on the 991.2 model. It’s faster, more powerful, and more aerodynamic than its predecessor, while also boasting more technology than ever. Thenew GT2 RS is a massive departure from the first GT2 from more than two decades ago under the skin, and we’re going to look at those changes in a drivetrain comparison for all four generations.