The 2025 Audi RS Q8 Performance gets more power and new looks, while remaining about $100,000 less expensive than its cousin, the Lamborghini Urus. Under the hood is a twin-turbocharged 4.0-liter V-8 producing 631 horsepower and 627 pound-feet of torque. That makes the RS Q8 Performance the most powerful combustion-engine RS model that money can buy. Audi acknowledges that most owners will never take this car to the track, but if they do, they can have just as much fun as anyone else. | Car and