The all-new BMW M4 Cabriolet arrives in Canada this fall, closely following the earlier introduction of its M4 Coupe and M3 Sedan siblings. The 2015 BMW M4 Cabriolet is powered by the same BMW TwinPower Turbo 3.0-liter inline six-cylinder engineĀ  producing 425 horsepower and 406 lb-ft of torque and can be mated to either a 6-speed manual or 7-speed M DCT transmission. The new BMW M4 Cabriolet arrives in Canadian BMW showrooms in September with an MSRP of $84,500.