All three cars come powered by a twin-turbocharged 3.0-liter straight-six engine delivering 425 horsepower and 406 pound-feet of torque. That’s only a slight increase in power over the outgoing M3’s 414-horsepower 4.0-liter V-8, but it is a significant leap in torque considering the old V-8 was delivering only around 295 pound-feet.
A six-speed manual is fitted as standard, with a seven-speed M-DCT dual-clutch transmission available for an additional $2,900. Other options include carbon ceramic brakes, a Driver Assistance Plus package that adds blind-spot monitoring, lane-departure warning, and active braking; and an Executive package that adds a head-up display, backup camera, parking sensors, heated rear seats, a heated steering wheel, satellite radio, keyless entry, and headlight washers.
The 2015 BMW M3, M4 and M4 Convertible hit showrooms this summer.