The BMW 3 Series has long been a sports sedan benchmark -- and perennial best-seller to boot. Not only is the 3 a focused sports sedan, it also boasts a well-crafted interior with high-tech electronics and thorough attention to detail. Recent updates have helped this BMW regain some of its sporty driving characteristics, while being one of the roomiest and most fuel-efficient models in this class.
That said, other rivals like the Audi A4 and Mercedes-Benz C-Class are almost as engaging to drive, and those German rivals have a more comfortable ride and quiet cabin. With typical options, the 3 Series also ends up costing more than the Audi and Mercedes, although lease rates are comparable.
While BMW offers a wide variety of 3 Series variations, we tested a mainstream 330i sedan. Its 2.0-liter turbocharged four-cylinder engine provides punchy performance. Paired with the slick eight-speed automatic transmission and xDrive all-wheel drive, we measured a commendable 26 mpg.
Opting for the diesel-powered 328d trades off some acceleration for better fuel economy, posting an impressive 35 mpg overall. Its 49-mpg highway mileage gives the car a lengthy driving range of 735 uninterrupted miles. The engine's added price and some diesel clatter are the primary drawbacks. The 330e plug-in hybrid can cover 14 miles on electric and cedes nothing in performance or driving enjoyment.
The engine in the entry-level 320i is a less powerful 2.0-liter turbocharged four-cylinder, but it's still eager and willing -- and competitively priced. The 340i supplies effortless thrust from its turbocharged six-cylinder, delivered with a baritone exhaust note.
Regardless of which 3 Series you choose, you'll find a very satisfying enthusiast-focused machine. The combination of a lively powertrain, and agile handling, make the 3 a delight to drive. While the tight ride takes the edge from road imperfections, it tends to get bit choppy. Most unwanted noises are kept outside, but some road noise on coarse pavement creeps in. You also hear the 330i's engine; some thought it sounded hearty and sporty, but others thought it sounded somewhat gruff and uncultured.
The businesslike interior isn't flashy, but it is impeccably furnished. Supremely comfortable seats prove supportive for the long haul. Rear-seat space is livable for this class but falls short of being generous. Nice touches include the ability to open the trunk lid by swiping your foot under the rear bumper -- helpful if your hands are full of packages.
By now, BMW's iDrive infotainment system has evolved to become more approachable. Once past an initial learning curve, the system proves logical and allows seamless interaction with audio, phone, and navigation functions. The electronic shifter requires a learning curve as well, and it lacks some desired safeguards to prevent rollaway if you fail to select Park.
Upright styling renders good visibility. Advanced safety equipment, such as forward-collision warning and automatic emergency braking, comes only as part of an expensive options package.
Additional variants of the 3 Series abound. The 330i and 328d can be had as a station wagon, making them among the last holdouts in this segment. A long-wheelbase hatchback version called Gran Turismo delivers plenty of rear legroom and a spacious cargo hold. At the extreme end of the spectrum is the high-performance M3. Coupe and convertible versions fall under the 4 Series designation.
Ultimately, the 3 Series may not be as well-rounded as the Audi A4 and Mercedes C-Class, but it still delivers the sportier drive.