In 2006, the BMW 3 Series sedans underwent a full revision giving birth to the 5th generation (E90). There is more car to appreciate with the 325i wheelbase stretched 1.4 inches and the body length 2.2 inches longer and 3 inches wider with a 25% stiffer body shell. This adds up to more interior leg, head, and cargo space with better handling.

There is also a new power train. A 3.0-liter dohc 24 valve, inline six with variable valve timing produces 255 hp encased in the first mass produced magnesium alloy engine block. A new six-speed manual is standard with a six-speed automatic and a six-speed sequential-manual(SMG) as transmission options. The 0-60 jump estimates are in the low-6 second bracket with manual transmission.

Even with the increase size and all-wheel drive system, a lot of weight savings come from both the engine castings and the extensive use of aluminum in the new suspension setup - up front, double-pivot aluminum control arms and in the rear, a five-link fully independent suspension. BMW's excellent xDrive all-wheel-drive system, which is used in the X3 and X5 SUVs, flows power through all four wheels. The system electronically controls a multi-disc central clutch that starts with a 40/60 front/rear torque split and integrates the Dynamic Stability Control system to quickly adjust torque and traction front, rear, and laterally.

Steering also retains the BMW class benchmark for feedback and precision, though reviewers uniformly gave thumbs down to BMW's new optional Active Steering system. The 5th gen BMW 3 Series come standard with an upgraded and innovative stability control system (DSC) that incorporates ABS with rain brake support which automatically wipes brakes dry in rainy conditions; brake standby, which sets the brake pads closer to the rotors and builds up brake pressure when the driver abruptly lifts his foot off the accelerator anticipating an emergency move; brake fade compensation which increases line pressure when the brakes heat up; and with the manual transmission, hill-start assist which keeps the car from rolling on hill starts. The stability control system can be turned off, but not the ABS system.

The interior has more room, upgraded materials, and power front seats. With the extra room, the 330xi is comfortable for four adults with the middle back seat best for children. The trunk has more space and easier access, but fold down rear seats which extend the cargo space are still an option.

If you are in the market for a sport car with all-weather sedan capabilities, the 5th generation 3-Series xi ups its previous bench mark for this category.