Initially, the 2006 BMW 3 Series will debut as a sedan sold in 325i and 330i trims with option packages that can turn them into luxury cars, sports cars, or both. Choosing one over the other is a question of engine power and price, because there are few differences otherwise. Most of what comes standard on the 330i can be added to a 325i.

Fresh features on the 2006 BMW 325i, which starts at $30,995 including a $695 destination charge, include new six-cylinder engines, a redesigned suspension, significantly upgraded brakes, and run-flat tires. There is no ignition key for 2006. Instead, the driver plugs a multi-function remote into a slot on the dashboard and fires the motor using a Start/Stop button. BMW has also added ground lighting in the door handles, rear ambience lighting, dynamic cruise control, MP3 playing capability, dual-zone automatic climate control, and a cooled center console storage box. Safety is improved through new automatic tensioning and force limiting rear outboard seatbelts, side-curtain airbags that protect both the front and the rear occupants, and seat-mounted side-impact airbags for the front seats.

Paying $6,000 extra for a 330i results in more horsepower, more torque, and unique wheel designs wearing bigger 17-inch tires. The 330i also comes with body color exterior trim, power adjustable front seats, a memory feature for the seats and mirrors, a tilt-down passenger-side mirror when reversing, a 13-speaker Logic 7 audio system, and xenon adaptive headlights with luminous rings and automatic leveling. An optional Sequential Manual Gearbox (SMG) becomes available on the 330i this fall for $1,500, but only when ordered in conjunction with the $1,600 Sport package. Otherwise, the 325i and the 330i are identical, available with the same standard and optional equipment.

Among the many new optional features for 2006 are a six-speed Steptronic automatic transmission, active steering, 18-inch wheels and tires (330i), iDrive navigation system with voice command control, Sirius satellite radio, and a power rear window sunshade with manual side window screens. Comfort Access keyless locking and ignition, which lets the driver keep the remote fob in a pocket or purse at all times, will be available as an option after the launch of the new 2006 BMW 3 Series.

Coupe, convertible, and station wagon versions of the new Three will follow at staggered intervals within two years. Also, BMW’s xDrive all-wheel-drive system is coming this autumn, just in time for buyers in foul-weather climates. And when the new M3 arrives, it will probably pack a V8 punch for the first time ever.