The 328i and the 328xi are propelled by a 3.0-liter inline six-cylinder engine that pumps out 230 horsepower and 200 pound-feet of torque. They offer a choice of six-speed manual or six-speed automatic transmission. The 328i is rear-wheel drive and the 328xi is all-wheel drive. Starting up the BMW 328 uses a slot-type key fob and a starter button, different from generations past. BMW's multi-layer, mouse-style iDrive interface is optional in the new 3 Series sedans, but if you want the DVD-based GPS navigation system, you'll have to take iDrive.For 2007, The 3 series coupe and convertible join the model lineup. The sedan is a carryover from 2006.