Aside from the convertible top and the features that come with it, the 8 Series Convertible is essentially the same as the coupe version. So it still makes 523 hp and 553 lb-ft of torque from its 4.4 liter twin-turbocharged V8, still uses an eight-speed auto and still has xDrive all-wheel drive. So, mechanically, it’s basically the same car. Though, its slight extra weight gain does slow its 0-60 mph time to 3.8 seconds, rather than the Coupe’s 3.6 seconds.