The BMW 7 Series cars are available in two lengths, each with a choice of engines. The 750i and long-wheelbase 750Li are powered by a 360-hp, 4.8-liter V8 with a six-speed automatic transmission with Steptronic. Safety features include dual frontal airbags, driver and front-passenger side-impact airbags, and BMW's Head Protection System. Also standard is BMW's Active Knee Protection.For 2006, the BMW 7 Series models offer a freshened appearance with a redesigned grille, hood and headlamps. The V8 engine on the 750i and 750Li has been revised and delivers significantly more power. And the iDrive system has been revised for improved graphics and easier operation.