BMW M4 Convertible xDrive Acceleration Tests Compares RWD With AWD

At 1,920 kilograms (4,232 pounds), the M4 Convertible with xDrive is the heaviest car you can buy from the 3 Series / 4 Series family with a combustion engine. Mind you, that’s after shaving off 40% of weight from the previous-generation model’s hardtop.