2013-2016 BMW Z4 (E89 LCI facelift ) 28i (245 Hp) sDrive Steptronic

The BMW Z4 (E89 LCI) 28i sDrive Steptronic, produced from 2013 to 2016, represents a mid-cycle refresh of the E89 Z4 Roadster. This variant occupied a sweet spot in the Z4 lineup, offering a balance of performance and affordability. The “LCI” (Life Cycle Impulse) facelift brought styling updates, revised interior trim, and importantly, the introduction of the N20 engine family, replacing the older N52. Positioned above the entry-level 20i and below the performance-oriented 35i/35is models, the 28i catered to drivers seeking a sporty roadster experience without the higher price tag or more aggressive tuning of its siblings.

Technical Specifications

INTRODUCTION

The E89 Z4 LCI 28i sDrive Steptronic, launched in 2013, represented a significant update to BMW’s second-generation Z4 roadster. Built on the 1HX0 platform (shared with the E82/E88 1 Series and E90/E92/E93 3 Series), the LCI brought a more refined aesthetic and, crucially, a new engine. The N20B20A 2.0-liter turbocharged four-cylinder engine replaced the naturally aspirated N52, offering improved fuel efficiency and a broader torque curve. The “sDrive Steptronic” designation indicates rear-wheel drive (sDrive) and the inclusion of BMW’s eight-speed automatic transmission. This combination aimed to provide a comfortable and engaging driving experience for a wider range of buyers.

Powertrain & Engine Architecture

At the heart of the Z4 28i lies the N20B20A engine, a 1.997-liter inline-four cylinder powerplant. This engine utilizes direct fuel injection, a twin-scroll turbocharger, and variable valve timing (Double-VANOS) and valve lift (Valvetronic) to optimize performance and efficiency. The N20 engine is known for its responsiveness and relatively smooth operation. The eight-speed automatic transmission (8HP45) is a key component, offering quick and seamless shifts. This transmission features a wide gear ratio spread, contributing to both fuel economy and acceleration. The transmission’s adaptive learning algorithms adjust shift points based on driving style. Unlike some competitors, BMW retained a traditional torque converter automatic, prioritizing smoothness over the more aggressive shifts of dual-clutch transmissions.

Driving Characteristics

The Z4 28i sDrive Steptronic delivers a balanced driving experience. While not as overtly sporty as the 35i, the 245 horsepower and 350 Nm (258 lb-ft) of torque provide ample power for spirited driving. Acceleration from 0-60 mph takes approximately 5.2 to 5.5 seconds. The automatic transmission is well-tuned, offering smooth upshifts and downshifts. The wide gear ratios allow the engine to operate efficiently at highway speeds. Compared to the six-speed manual transmission available on other Z4 models, the eight-speed automatic prioritizes comfort and ease of use. The rear-wheel-drive configuration provides a classic roadster feel, with balanced handling and predictable cornering. However, the relatively narrow track width can result in some body roll during aggressive maneuvers.

Equipment & Trim Levels

The Z4 28i sDrive Steptronic came reasonably well-equipped as standard. Features typically included leatherette upholstery, automatic climate control, a power-retractable hardtop, BMW’s iDrive infotainment system with a 6.5-inch display, and 17-inch alloy wheels. Optional extras were plentiful, including premium leather upholstery, heated seats, navigation, a Harman Kardon sound system, and adaptive headlights. The LCI facelift also brought updated interior trim options and improved material quality. A Sport package added sport seats, a sport steering wheel, and revised suspension tuning.

Chassis & Braking

The Z4 E89 utilizes a double-wishbone front suspension and an independent multi-link rear suspension. This setup provides a good balance of ride comfort and handling precision. The 28i model typically featured ventilated disc brakes on all four wheels, providing adequate stopping power. ABS (Anti-lock Braking System) was standard. The rear brakes on some earlier models could be drums, but the LCI models generally featured disc brakes all around. The steering is a rack-and-pinion system with electric power assistance, offering precise and responsive steering feel.

Market Reception & Comparison

The Z4 28i sDrive Steptronic was generally well-received by automotive critics. It was praised for its refined engine, comfortable ride, and well-equipped interior. Compared to the Z4 20i, the 28i offered a significant performance boost without the higher cost of the 35i. Fuel economy was also a strong point, with combined figures around 34.6 US mpg. However, some critics noted that the Z4’s interior was somewhat cramped and that the trunk space was limited. Compared to rivals like the Porsche Boxster and Audi TT Roadster, the Z4 offered a more comfortable ride but lacked the same level of sporting prowess.

Legacy

The N20 engine, while generally reliable, has been known to exhibit some issues, including oil leaks and potential for timing chain wear, particularly if maintenance is neglected. The eight-speed automatic transmission has proven to be durable and reliable. Today, the E89 Z4 28i sDrive Steptronic represents a relatively affordable entry point into the BMW roadster experience. Well-maintained examples are readily available on the used car market. Its combination of performance, comfort, and style continues to appeal to enthusiasts seeking a sporty and enjoyable open-top driving experience. The LCI facelift improvements, particularly the N20 engine, make it a desirable variant within the E89 Z4 range.