Under the Hood

The 135i's turbocharged inline-six makes 300 horsepower and 300 pounds-feet of torque. It works through a six-speed manual or BMW's seven-speed dual-clutch automatic. Either car hits 60 mph in about 5 seconds, BMW says. The M Sport Package adds a sport-tuned suspension with high-performance, six-piston front and two-piston rear brakes.

If that seems like too much, consider stepping down to the 230-hp, normally aspirated 128i, which is covered separately in the Cars.com Research section.

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    Controls on the interior rearview mirror
    ► LED, arrow 1. ► Buttons, arrow 2. ► The hand-held transmitter, arrow 3, is required for programming. ...

    Requirements
    ▷ The installed BMW Assist system is logged in to a wireless communications network. This network must be capable of transmitting the services. ▷ To transmit position data, the vehic ...

    Adaptive brake assistant
    In combination with the Active Cruise Control, this system ensures that the brakes respond even more rapidly when braking in critical situations. Refer also to Collision warning. ...