Both of these vehicles are made to impress. You'll get a powerful vehicle from both. And, you'll find very similar powertrain options in both vehicles. The biggest pro on the G80 power wise is that it is more efficient than the G90 due to its smaller frame. The G90, however, has a larger gas tank that will allow you to stay on the road longer during road trips.
The Genesis G80 comes with two powertrain choices. The Genesis G80 2.5T comes with a turbocharged 4CYL engine that gets 300HP and 311 pound-feet of torque. The Genesis G80 3.5T has a twin-turbo V6 engine that gets an impressive 375HP and 391 pound-feet of torque. An 8-speed automatic and rear-wheel drive come standard on both, but all-wheel drive is always available. Reviewers and drivers were impressed with the first engine choice alone. It allows drivers to get up to speed quickly and maneuver easily. The second just gives you even more authority. Both engines give you a comfortable, quiet, and smooth ride on any surface.
The Genesis G90 also comes with two powertrain options. The first is a 3.3L twin-turbocharged V6 engine that gets 365HP and 376 pound-feet of torque. It moves with serious prowess. The other option is a 5.0L, V8 engine that gets 420HP and 383-pound-feet of torque. There isn't a huge difference between these two, but the naturally-aspirated V8 is the only offering of the kind in its class.
Both rides max out with equal power from the V8. They also come standard with sporty rear-wheel drive (RWD), but you can upgrade to all-wheel drive (AWD) for more traction on the road.