In comparison, the M50d is classified as an "M Performance Car" which means it isn't a full M car unlike the BMW M3 or the BMW M5.

Its S63B44T2 4.4 liter V8 engine has 575 hp (429 kW) and 553 lb⋅ft (750 N⋅m) of torque, which made it the most powerful engine ever developed for an all-wheel drive BMW at the time.

The engine has M TwinPower Turbo and Valvetronic technologies, to deliver a 0–100 km/h (62 mph) time of 4.2 seconds.

[1] An M-tuned xDrive all-wheel drive system provides traction.

It distributes drive between the front and rear axles, while Dynamic Performance Control distributes torque between the 21-inch M Double-spoke light-alloy wheels—all for dynamic driving and all-road capability.