Features
The Z4 used lightweight materials to offset the increased weight over the smaller Z3, such as aluminum hood and suspension components, magnesium roof frame. Run flat tires removed the need for a spare tire, which in addition to saving weight, allowed for a larger boot.
Advanced aerodynamics yield a drag coefficient of 0.35 and a relatively calm passenger compartment when the top is down.
The 6-cylinder engines included all alloy construction, double VANOS variable valve timing and streamlined intake and exhaust manifolds, throttle by wire. Safety technology included four-wheel disc brakes and electronic stability control, incorporating ABS and traction control. The electric power steering was speed-sensitive, allowing for easier maneuvering at low speeds.
A "Sport Package" added stiffer and lower suspension, larger wheels, and sport tuned electronic steering, throttle and shift parameters.
The SMG transmission was offered in addition to the usual manual and automatic.
Production of a cheaper 2.2-litre model began in October 2003, priced from £18,500 in UK. It weighs 35 kg (77 lb) less than the 3.0L version, but is still heavier than the 2.5L Z3's weight of 1,315 kg (2,900 lb). A 2.0L 4-cylinder engine for the European market was introduced in May 2005.
Read more about this topic: BMW Z4 (E85)
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