The DBX represents a major shift for Aston Martin, and a response to the finest and most expensive SUVs on the planet coming from Porsche, Bentley, Lamborghini and Ferrari. Under the long hood is a twin-turbocharged V8 engine generating 542 horsepower and 516 lb-ft. of torque. The big news for 2023, literally, is the addition of the exotic DBX 707, which increases output up to 697 horsepower and 664 lb-ft. of torque.