2015 BMW M3

Completely redesigned for the latest model year, the BMW M3 sedan remains one of the best-rounded performance machines on the market. With a torquey new twin-turbo straight-six and a carefully tuned suspension, the uber-3-Series is quicker and nimbler than ever before, while a handsomely-equipped cabin also makes it comfortable commuter.

Notably, the M3 is also available in coupe form, with the two-door now wearing the M4 badge.

Overview
For the latest M3, BMW continues to follow the successful formula it established with the sedan's well-respected predecessors: start with the standard 3-Series and add more power, a more dexterous chassis and special styling. Of course, there's a few new wrinkles this time around, as the M3 incorporates a host of new high-tech features and lightweight components.

Also new is the M3's potent powerplant. In place of the characterful but thirsty 4.0-liter V8 in last year's model is 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.

Transmission options include a six-speed manual and a seven-speed dual-clutch automatic. The standard-equipment stick shift 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 boasts 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 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 are 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 six-speed manual (-26 lbs.), smaller engine (-22 lbs.) and carbon fiber roof (-11 lbs.).

Looking the Part, Inside and Out
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, which means it includes a quartet of simple, driver-friendly analog gauges and a tablet-style 6.5-inch display screen mounted atop the dashboard that displays stereo and vehicle information. Shell out for the optional navigation system, and the screen is upgraded to a larger 8.8-inch unit.

All secondary systems are controlled through BMW's iDrive infotainment setup, which has evolved over the years from a bewildering complex unit to surprisingly simple and user-friendly system. Redundant controls on the steering wheel and dashboard provide alternate means of accessing the electronics.

The optional navigation system is available with Google point-of-interest search and real time traffic information, and it also features a touchpad mounted on the iDrive knob that lets users write out phone numbers, contact names and navigation destinations - and also zoom in or zoom out the map - with a finger.

Setting the M3 apart from the standard 3-Series is 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.

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.

Key Competitors
The M3 Sedan is pitted against the Mercedes-Benz C63 AMG, Lexus IS F and Cadillac CTS-V. All three of those rivals are on the verge of being redesigned, with the CTS-V set to move up a size class to allow the upcoming ATS-V to serve as Cadillac's M3-fighter. Despite their age, each model offers a highly appealing blend of performance and luxury.