BMW i7 review by The Straight Pipes. The BMW i7 xDrive 60 is putting down 536 horsepower and 549 lb-ft of torque from 2 electric motors and a 102 kWh battery. At $144,999, would you take it over the Mercedes EQS, Mercedes S Class, Mercedes-Maybach S Class, Audi e-Tron GT, Porsche Taycan, or the gas powered BMW 760i xDrive?