the new 2023 genesis g90 sedan will offer a version of the company's twin-turbo 3.5-liter v-6 engine with a 48-volt hybrid system in the u.s. a genesis spokesperson confirmed to c/d that this new powertrain will use an electric supercharger, and epa documents reveal that it will produce 420 horsepower—a significant bump over the 375 hp that this engine makes in standard form.
curiously, the addition of this hybrid setup results in a drop in fuel economy, as epa ratings show that the "mhev" model has a combined rating of 20 mpg, one mpg lower than the standard twin-turbo 3.5-liter v-6. we'd guess that the extra mass associated with the hybrid system could account for this disparity. both powertrains use an eight-speed automatic transmission and come standard with all-wheel drive. for reference, the mercedes-benz s500 with a 429-hp inline-six and a 48-volt hybrid system achieves an epa combined rating of 24 mpg.
genesis originally said that this hybrid setup would only be used in the stretched long-wheelbase version of the g90, which is not slated to come to the u.s. but now the company says that the more powerful engine will be offered in the standard-wheelbase car that will be sold on our shores. we don't know what kind of price premium the hybrid setup will command, but we figure it'll be a few thousand dollars extra given its extra power.
look for more details to come on the 2023 g90, including pricing, as the flagship sedan is slated to arrive in the u.s. later this year.