However, there's the small matter of that new, larger, and more powerful 5.0-liter V-8 engine and the sport-tuned R-Spec suspension package to attend to. The R-Spec package makes a night-and-day difference in the performance of the Genesis Coupe 3.8 R-Spec's cornering and stopping abilities, so it was with a good deal of excitement that I settled into the "ultra premium" leather driver's seat to see if this big, black sedan could back up the performance claim of that bright, red "R.