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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    Front fog lamps
    The parking lamps or low beams must be switched on. Press the button. The green indicator lamp in the instrument cluster lights up. If the automatic headlamp control, is activated, the low b ...

    Variable sport steering
    The variable sport steering increases the steering angle of the front wheels at large steering wheel angles, e.g., in tight curves or when parking. Steering becomes more direct. It also varies t ...

    Performance
    The 650i is the only 6 Series trim available for 2012; the convertible is hitting the market ahead of the hardtop coupe. The rear wheels are powered by a 400-horsepower, twin-turbo 4.4-liter V-8 e ...