Fans of BMW's new Z4 Coupe are in luck -- the first Z4 and M Coupes rolled off the line at BMW's plant in Spartanburg, S.C., just in time for summer sales drives. Both vehicles get their power from BMW's sonorous 3.2L inline six, though the M model provides a bonus 115 horsepower over the base model's 255 hp (for a total of 370) and a 0-60 time of under 5 seconds.