The BMW Z4 (the successor to the BMW Z3) is one of the most enthralling sports cars available. Defining Features These include a front-engine/rear-drive layout, an elongated bonnet and rear-ward positioning of driver and passenger. While the first Z4 featured a traditional soft top, the current Z4 model has a sleek retractable hardtop – an all-weather option. The current Z4 also represents a slight change in philosophy for BMW's roadster. Not only does it sacrifice ultimate handling for greater ride comfort and overall refinement, but it also employs a highly fuel-efficient turbo-charged four-cylinder as its base engine. The result is one of the most well-rounded sports cars money can buy. Current BMW Z4 The current Z4 is offered with rear-wheel drive in three trim levels: sDrive28i, sDrive35i and sDrive35is. · The 28i gets a turbo-charged 2.0-litre inline-4 that produces 177 Kw power with a six-speed manual transmission as standard, with an eight-speed automatic available as an option. · The 35i comes with a twin-turbocharged 3.0-liter inline-6 good for 221 Kw power with a seven-speed dual-clutch automated manual (DCT). · The 35is utilizes DCT and a revised version of the regular 35i's engine, boasting 247 Kw power with a temporary over-boost function that pumps torque upwards.. Equipment Differences 1. The sDrive28i comes standard with 17-inch wheels, adaptive xenon headlights, keyless ignition and entry, dual-zone automatic climate control, eight-way power seats, Bluetooth and adjustable driving settings that change the programming for the steering, throttle and (if specified) automatic transmission. 2. The sDrive35i adds 18-inch wheels, sun-reflective leather upholstery and sport seats. 3. The sDrive 35is is similar but comes standard with an upgraded audio system and the performance-themed M Sport package (optional on other Z4s). 4. Option highlights include heated seats and steering wheel, front and rear parking sensors and a navigation system. The latest BMW Z4 is an impressive and highly refined sport touring car, with a surprisingly roomy interior and decent trunk space as long as the retractable roof is raised. Although the turbo-4 makes less power than the old inline-6, it's got more torque, and fuel economy is substantially improved The Z4 is generally a smooth easy drive, especially if you go for the optional M Sport package and leave the adjustable drive settings in Sport mode. Most buyers will appreciate the Z4's firm yet compliant ride and accomplished all-around performance and appreciate a 'top-down' journey as a wonderful way to spend a sunny day.