The BMW Z4 is a rear-wheel drive sports car by the German automaker BMW, known as the E85 in roadster form and E86 in coupe form. Production started in 2002, and thus replaced the BMW Z3. The design addresses many criticisms of the Z3; the Z4 is larger, and has a significantly stiffer chassis. It is built in Spartanburg, South Carolina. Initially, the Z4 was available only as a roadsterThe Z4 was designed by Chris Bangle and began the controversy over his "flame surfacing" design and aggressive styling choices, which can also be seen on most modern BMW cars, most noticeably the 7 Series and 5 Series. As of 2007, the entire BMW car line, including the BMW 3 Series and X5 SAV, had incorporated Chris Bangle's design theme., but in 2006 a coupé version was officially launched.
The Z4 features a strut type front suspension like its predecessor, the Z3. 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. The Z4 offered a choice of four straight-six engines: A 2.2 L, a 2.5 L, a 3.0 L, and a 3.2 L. All are variants of the BMW M54 engine. In the European market, a 2.0 L straight-4 is also offered. The 2.2 L, 120 kW (170 bhp) version can reach 100 km/h in 7.7 s, but is not sold in the United States. The most powerful car of the Z4 line-up is the Z4 M. It features a naturally aspirated, in-line six cylinder engine, used in the third generation of the BMW M3. It produces 340 bhp at 7900 rpm, and 365 nm (270 lb-ft) of torque. 0-100 km/h takes 5 seconds, and the top speed is limited to 250 km/h. 
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