Significantly lighter than the outgoing model, the redesigned 2015 BMW M3 also gains a torquier and more efficient six-cylinder motor.
Additionally, the Blue Roundel has unveiled the 2015 M3′s sleek two-door counterpart, the M3 Coupe-replacing 2015 BMW M4.
Less is More
In place of its predecessor’s characterful but thirsty 4.0-liter V8, the new M3 uses a downsized 3.0-liter inline-six that relies on twin turbochargers to produce 425 horsepower and 406 lb-ft of torque from just 1,850 rpm all the way to 5,500 rpm. Those figures represent gains of 11 ponies and, more importantly, 111 lb-ft of twist compared to the old eight, with peak torque arriving 2,050 rpm earlier.
While official ratings have yet to be released, BMW claims a fuel economy improvement of 25 percent; the 2013 M3 was rated at 14/20 city/highway mpg.
Buyers will continue to have the choice of manual and dual-clutch automatic gearboxes, but both have been redesigned. The standard-equipment six-speed stick features a rev-matched downshift function and helps the sedan to accelerate from zero-to-60 mph in a claimed 4.1 seconds, while the seven-speed dual-clutch – which is up a gear over the previous unit – gets launch control and a slightly quicker sprint time of 3.9 seconds. Also part of the septa-cog’s bag of tricks is a “Stability Clutch Control” function that opens one of the clutches in order to quell understeer.
Upgraded M compound brakes on all four corners and a stiffened, track-tuned suspension will keep M3′s newfound power in check. As expected, hydraulic-assist steering gives way to a new, more efficient electric-assist setup with three different effort modes. An optional Adaptive M suspension with electronically-controlled dampers also offers a trio of modes, allowing drivers to prioritize ride comfort or handling agility.
All M3s will be equipped with an Active M Differential that keeps tabs on throttle inputs, the rotational speed of the wheels and the car’s yaw rates in order to maximize traction.
Thanks in part to the increased use of carbon fiber reinforced plastic and aluminum in the body and suspension, the M3 is an impressive 176 lbs. lighter than before. Contributing to the weight loss are components like the new six-speed manual (-26 lbs.), smaller engine (-22 lbs.) and carbon fiber roof (-11 lbs.).
Looking the Part
Outside, the M3 wears a heavily-sculpted front bumper, a discreet hood bulge and flared fenders all around. Air curtains mounted in the front apron team up with “Air Breathers” – that’s BMW-speak for fender vents – to optimize airflow around the wheel arches and improve aerodynamics. Around back, a diffuser with inset quad tailpipes and a Gurney-style spoiler provide both style and function. Eighteen-inch rims are fitted as standard, while 19-inchers can be specified as an option.
The M3′s cabin is closely modeled after the standard 3-Series, with differences including an M-specific instrument cluster, a sporty three-spoke multifunction steering wheel, sports seats and carbon fiber trim on the dashboard and on the center console. Naturally, liberal helpings of M badging are also part of the package. A tablet-style 6.5-inch display screen mounted on top of the dashboard displays stereo and vehicle information.
Notable options will include a head-up display, a front collision warning system, full LED headlights, and, on the performance end, lightweight and extra fade-resistant carbon ceramic brakes.
Following its formal debut at the North American International Auto Show in Detroit, the 2015 M3 will arrive at dealerships in early summer. Expect pricing, standard features and the full options list to be released closer to that launch date.
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