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The first generation of the BMW Z4 was designed by Danish BMW-designer Anders Warming from mid-1998 to March 1, 2000.〔(【引用サイトリンク】title=Design to Reality: the Z4 Roadster )〕 The Z4 was introduced at the Paris Auto Show in 2002, and went on sale in November of the same year for the 2003 model year. It is a physically larger, completely redesigned successor to the Z3. Initially, it was only available as a roadster with the 2.5L or 3.0L inline six-cylinder engines. Warming's design was controversial, as were many BMW designs of the time produced under the watchful eyes of BMW chief designer Chris Bangle. The Z4's design addressed many criticisms of the preceding Z3; the Z4 is larger, and has a significantly stiffer chassis. The Z4 features a strut type front suspension like its predecessor. The rear suspension, however is considerably different from that of the Z3, which was based on that of the E30 BMW 3 Series. Instead of a semi-trailing arm suspension, the Z4 uses a more advanced multi-link suspension. ==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 manoeuvering 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 more usual manual and automatic transmissions. Production of a cheaper 2.2-litre model began in October 2003, priced from £18,500 in the UK. It weighs less than the 3.0L version, but is still heavier than the 2.5L Z3's weight of . A 2.0L 4-cylinder engine for the European market was introduced in May 2005. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BMW Z4 (E85)」の詳細全文を読む スポンサード リンク
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