The BMW Z4 (E89 LCI), specifically the 35i sDrive variant produced from 2013 to 2016, represents the facelifted iteration of the first-generation Z4 Roadster (E89). This model aimed to refine the original Z4’s design and driving experience, offering a more luxurious and performance-oriented package within the premium roadster segment. The “LCI” (Life Cycle Impulse) designation signifies a comprehensive mid-cycle refresh, including styling updates, revised engine options, and enhanced interior features. The 35i sDrive, positioned as a high-performance trim, served as a step up from the base 28i models, offering significantly more power and a more engaging driving experience.
Technical Specifications
| Brand | BMW |
| Model | Z4 |
| Generation | Z4 (E89 LCI, facelift 2013) |
| Type (Engine) | 35i (306 Hp) sDrive |
| Start of production | 2013 |
| End of production | 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 13.5 l/100 km (17.4 US mpg, 20.9 UK mpg, 7.4 km/l) |
| Fuel consumption (economy) – extra urban | 7 l/100 km (33.6 US mpg, 40.4 UK mpg, 14.3 km/l) |
| Fuel consumption (economy) – combined | 9.4 l/100 km (25 US mpg, 30.1 UK mpg, 10.6 km/l) |
| CO2 emissions | 219 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.2 sec |
| Acceleration 0 – 62 mph | 5.2 sec |
| Acceleration 0 – 60 mph | 4.9 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.9 kg/Hp, 203.3 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 265.8 Nm/tonne |
| Power | 306 Hp @ 5800 rpm |
| Power per litre | 102.7 Hp/l |
| Torque | 400 Nm @ 1300-5000 rpm (295.02 lb.-ft. @ 1300-5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | N54B30A |
| Engine displacement | 2979 cm3 (181.79 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 84 mm (3.31 in.) |
| Piston Stroke | 89.6 mm (3.53 in.) |
| Compression ratio | 10.2:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-power turbo, Intercooler |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 8.2 l (8.66 US qt | 7.21 UK qt) |
| Kerb Weight | 1505 kg (3317.96 lbs.) |
| Max. weight | 1835 kg (4045.48 lbs.) |
| Max load | 330 kg (727.53 lbs.) |
| Trunk (boot) space – minimum | 180 l (6.36 cu. ft.) |
| Trunk (boot) space – maximum | 310 l (10.95 cu. ft.) |
| Fuel tank capacity | 55 l (14.53 US gal | 12.1 UK gal) |
| Length | 4239 mm (166.89 in.) |
| Width | 1790 mm (70.47 in.) |
| Height | 1291 mm (50.83 in.) |
| Wheelbase | 2496 mm (98.27 in.) |
| Front track | 1511 mm (59.49 in.) |
| Rear (Back) track | 1537 mm (60.51 in.) |
| Ride height (ground clearance) | 130 mm (5.12 in.) |
| Drag coefficient (Cd) | 0.35 |
| Minimum turning circle (turning diameter) | 10.7 m (35.1 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 6 gears, manual transmission |
| Front suspension | Double wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 225/45 R17; 255/40 R17 |
| Wheel rims size | 8J x 17; 8.5J x 17 |
INTRODUCTION
The E89 Z4 LCI 35i sDrive was produced between 2013 and 2016, representing a significant upgrade over the pre-facelift models. Built on the E89 platform, it continued BMW’s tradition of offering a sporty and engaging roadster experience. The LCI brought with it revised styling cues, including redesigned headlights and taillights, a more aggressive front bumper, and updated interior trim. The 35i variant, powered by the N54 engine, was positioned as the performance leader in the Z4 lineup, appealing to drivers seeking a more thrilling driving experience than the base 28i models could provide. It competed directly with other premium roadsters like the Porsche Boxster and Mercedes-Benz SLK.
Powertrain & Engine Architecture
At the heart of the Z4 35i sDrive lies the N54B30A, a 3.0-liter inline-six engine. This engine is a marvel of engineering, featuring direct fuel injection, a twin-turbocharger setup, and variable valve timing (VANOS) on both the intake and exhaust camshafts. The twin-turbo configuration utilizes two smaller turbochargers instead of a single large one, resulting in reduced turbo lag and improved responsiveness across the rev range. The N54 engine produces 306 horsepower at 5800 rpm and 400 Nm (295 lb-ft) of torque between 1300 and 5000 rpm. This broad torque curve contributes to strong acceleration in real-world driving conditions. The engine is longitudinally mounted, driving the rear wheels. The 6-speed manual transmission was standard, offering precise shifts and a direct connection to the engine.
Driving Characteristics
The Z4 35i sDrive delivers a dynamic and engaging driving experience. The combination of the powerful N54 engine and the rear-wheel-drive layout provides excellent acceleration and handling. The 0-60 mph sprint takes approximately 4.9 seconds, making it a genuinely quick roadster. The manual transmission allows for precise control over gear selection, enhancing the driving experience. The suspension, featuring a double-wishbone front and multi-link rear setup, provides a good balance between comfort and handling. While not as track-focused as some sports cars, the Z4 35i sDrive offers a rewarding driving experience on winding roads. Compared to the 28i models, the 35i provides a noticeable increase in power and responsiveness, making it more enjoyable for spirited driving.
Equipment & Trim Levels
The Z4 35i sDrive came standard with a generous array of features, including leather upholstery, power-adjustable seats, automatic climate control, a premium sound system, and BMW’s iDrive infotainment system. Optional extras included navigation, heated seats, a retractable hardtop (which transformed the roadster into a coupe), and various cosmetic enhancements. The interior design was focused on providing a sporty yet luxurious environment. The dashboard layout was driver-centric, with all essential controls within easy reach. The quality of materials and fit and finish were generally excellent, reflecting BMW’s commitment to premium craftsmanship.
Chassis & Braking
The Z4 E89 chassis is built around a robust steel structure, designed to provide a high level of rigidity. The suspension system, as mentioned earlier, utilizes a double-wishbone front setup and a multi-link rear setup. This configuration provides excellent wheel control and contributes to the car’s balanced handling characteristics. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. ABS (Anti-lock Braking System) is standard, enhancing safety and stability during hard braking. The steering is a rack-and-pinion system with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The Z4 35i sDrive was generally well-received by automotive critics. It was praised for its powerful engine, engaging handling, and luxurious interior. However, some critics noted that the ride could be firm on rough roads. Compared to the 28i models, the 35i offered a significant performance upgrade, justifying the higher price tag for enthusiasts. Fuel economy was reasonable for a performance roadster, averaging around 25 mpg in combined driving. Reliability was generally good, although the N54 engine has been known to require occasional maintenance, particularly related to the fuel injectors and cooling system.
Legacy
The BMW Z4 E89 LCI 35i sDrive remains a desirable roadster in the used car market. Its combination of performance, luxury, and style continues to appeal to enthusiasts. The N54 engine, while requiring some maintenance, is known for its tunability and potential for increased power. Well-maintained examples of the 35i sDrive can provide years of enjoyable driving. The car represents a high point in BMW’s roadster heritage, offering a compelling alternative to its competitors. Its enduring appeal is a testament to its well-rounded design and engaging driving experience.
