The base E-Tron GT has a 235-hp front motor and a 429-hp rear motor, which combine to make 469 hp and 464 lb-ft of torque in regular operation and 523 hp and 472 lb-ft when using launch control. (And if you’re wondering why the two motors don’t combine to make 670 hp, they likely don’t make peak power at the same time.) Those figures are similar to those of the Porsche Taycan 4S, and Audi’s claimed 3.9-second 0-60 mph time is a tenth off the Porsche’s. The RS E-Tron GT has the same front motor as the base model, but it’s paired with a 450-hp motor out back. The combined total output is 590 hp, 637 hp with launch control, with 612 lb-ft of torque. Audi quotes a 3.1-second 0-60 mph time, so this model slots in slightly under the Taycan Turbo.
The article Road & Track Goes more in depth.