From the Detroit International Auto Show ... the new Z3's, M style! 

Completing the BMW debut line-up at the Detroit International Auto Show are the new M Coupé and M Roaster models featuring the new 3.2 litre straight six Motorsport engine. 

In this form, these cars develop 325 hp, up from the 321 hp of the previous models. 

Acceleration times from zero to 62 mph for both models are now 5.3 seconds, compared to 5.4 seconds for the previous models. 

Maximum speeds are electronically limited to 155 mph. 

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