2015 BMW M3 Sedan

PREVIEW

The BMW M3 returns for 2015. Based off the latest 3 Series, it will offer a turbocharged six-cylinder engine and an aluminum-intensive body and chassis.

It's back. Or rather, it's on the way for 2015. The BMW M3 returns after a brief hiatus, as is its custom when a new generation of BMW 3 Series has been introduced. Rumors about BMW's most beloved high-performer abound, but the automaker's North American boss recently clarified one of the chief mysteries: The V8 is gone.

Instead, the M3 will get BMW's classic 3.0-liter inline six-cylinder, this one a twin-turbocharged mill generating 426 horsepower and 406 pound-feet of torque. The introduction of turbocharging marks a significant departure for a nameplate with a long tradition of high-revving, naturally aspirated engines. The new engine will still rev high -- up to 7,600 rpm, BMW says -- although peak power arrives around 5,000 rpm and peak torque around 2,000 rpm. The new turbo-6 is also 22 pounds lighter than the V8 it replaces.

Two transmissions are available: a new six-speed manual fortified with a twin-plate clutch, stronger gears and rev-matching, or a seven-speed dual-clutch automated manual. BMW says the new powertrain, along with a lighter curb weight, will deliver zero to 62 mph in 4.1 seconds. The M3 even offers a "Smokey Burnout" function -- we're serious -- that BMW says "allows the driver to indulge in a degree of rear wheelspin while the car is moving at low speeds."

The 2015 BMW M3 will be larger, yet lighter than its predecessor. For reference, the new 3 Series sedan is 3.7 inches longer than the previous model, but it weighs less -- around 175 pounds leaner than its predecessor -- thanks to aluminum suspension and chassis components, a new carbon-fiber roof and increased use of high-strength steel throughout the body.

The M3 also gets electric-assist steering similar to that fitted on the new 3 Series (although with high-performance tuning). It's one of many components that M Division engineers use to meet ever-tightening European and U.S. fuel economy standards. Comfort, Sport and Sport+ modes allow drivers to dial up increasing amounts of steering effort. The electric-assist steering in the regular 3 Series has drawn complaints from the BMW faithful, though we suspect only the most astute M3 buyer will perceive a real dynamic difference. An optional Adaptive M suspension offers the same three modes for relaxed driving or more aggressive street and track settings.

The M3 will also offer a host of contemporary safety and driver assistance systems, including pedestrian collision warning, adaptive cruise control and adaptive high beams designed to avoid blinding oncoming drivers.

The M3 will debut in January 2014 and should go on sale by spring. Check back for a full review of the next M3, including specs, driving impressions and buying advice as it becomes available.