The RLX has an X in its name. It has a seven-speed dual-clutch transmission on all-wheel-drive models. Its V-6 is a bit smaller (3.5 liters versus 3.7) and boasts, yes, direct injection to increase output and efficiency. And its SH-AWD setup is now officially called Sport Hybrid SH-AWD, on account of its two electric motors at the rear axle. The skinny on the new system: Rather than a more complicated mechanical differential and driveshaft, the RLX uses electricity to spin the rear wheels and provide torque-vectoring capabilities.