BMW Z4 SDrive35is Review: 335 Hp Performance And Limitations

The BMW Z4 sDrive35is stands as the pinnacle of the Z4 lineup, delivering a blend of raw performance and open-top luxury. This flagship model boasts a turbocharged 3.0-liter inline-six engine tuned to 335 horsepower, paired with a seven-speed dual-clutch transmission. While its powertrain impresses with explosive acceleration and a seductive exhaust note, the chassis reveals limitations in ride comfort and composure, making it a car of highs and lows for driving purists.

Engine and Performance: A Turbocharged Marvel

At the heart of the Z4 sDrive35is lies BMW’s renowned N54 3.0-liter twin-turbo straight-six engine, enhanced for this variant with an overboost function that pushes peak torque to 369 lb-ft. This setup propels the car from 0-60 mph in under 4.8 seconds, with a governed top speed of 155 mph. Reviewers praise the low-end torque surge, available from just 1,300 rpm, which makes everyday driving effortless while unleashing neck-snapping mid-range punch.

The sports exhaust system elevates the auditory experience, emitting a raspy growl reminiscent of classic grand tourers, complete with crackles on gear shifts. This 10-decibel increase over lesser models adds character without overwhelming refinement. Official figures claim around 30 mpg combined, aided by EfficientDynamics tech, though real-world testing often yields mid-20s in spirited use.

• Peak Power: 335 bhp at 5,900 rpm
• Torque: 369 lb-ft (overboost) from 1,300-5,000 rpm
• 0-62 mph: 4.8 seconds
• Top Speed: 155 mph (limited)
• Fuel Economy: 31.4 mpg (auto)

Transmission and Drivetrain Dynamics

The seven-speed M DCT gearbox, borrowed from the M3, is a highlight, offering lightning-quick shifts via steering-wheel paddles. In Sport+ mode, it holds gears longer and blips the throttle on downshifts for seamless performance. While the manual option in lower Z4s suits purists, the DCT’s paddle control maximizes the engine’s potential, making it ideal for track days or canyon carving.

Drive Dynamic Control allows mode switching—Normal for cruising, Sport for sharper responses, and Sport+ for maximum aggression—adjusting throttle mapping, steering weight, and damper firmness. This versatility transforms the Z4 from a grand tourer to a pseudo-supercar at the touch of a button.

Chassis and Handling: Strengths and Shortcomings

Despite the powertrain’s excellence, the chassis tuning draws mixed verdicts. The adaptive M Sport suspension lowers the ride height by 10mm and uses sensors to firm up over bumps, providing good body control in casual driving. However, on imperfect roads, it transmits harshness, exacerbated by optional 19-inch wheels.

Critics note rear-end squat under acceleration and insufficient lateral grip in committed cornering, with the 3,400-pound curb weight feeling evident. Grip levels are high thanks to Michelin Pilot Sport tires, but the steering, while precise, lacks the telepathic feel of lighter rivals like the Porsche Boxster.

Retractable Hardtop: Practical Elegance

The Z4’s aluminum hardtop folds in 20 seconds, even at speeds up to 31 mph, converting coupe to convertible seamlessly. With the roof up, visibility is excellent over the long bonnet; down, wind buffeting is minimal up to highway speeds. Boot space shrinks from 10.1 to 6.5 cubic feet roof-down, limiting practicality for two-seaters.

This design offers superior security and insulation over fabric roofs, maintaining a sleek profile year-round. It’s a boon for variable climates, blending roadster freedom with GT coupe usability.

Interior and Comfort: Driver-Focused Luxury

Cabin quality shines with supportive leather sports seats, carbon-fiber accents, and a multifunction wheel. The low-slung driving position fosters engagement, though rearward visibility suffers roof-up. Standard nav, premium audio, and climate control feature in the extensive kit list, justifying the premium price.

Build quality is impeccable, with tactile switchgear and intuitive layout. However, the fixed targa-style rear window aids coupe-mode rear vision but can’t match full convertibles’ openness.

Design and Styling: Timeless Appeal

The Z4’s evolved lines—flared arches, lowered stance, and quad exhausts—convey aggression without ostentation. M Sport elements like aero kits and 19-inch alloys enhance presence. At over £50,000 new, it targeted enthusiasts valuing performance over outright agility.

Rivals and Value Proposition

Against the Porsche 718 Boxster or Audi TT Roadster, the Z4 offers more power but lags in chassis finesse. It’s pricier than entry Z4s, which pair similar looks with better-balanced dynamics via manuals. For pure thrills, the sDrive35is excels; for all-around usability, consider alternatives.

• Porsche 718 Boxster: Sharper handling, less power
• Audi TT RS: Quattro grip, smaller engine
• Mercedes SLK55: Similar power, softer ride

Safety and Everyday Usability

Standard stability control, multiple airbags, and strong crash structure underpin safety. As a daily driver, it’s refined enough for commutes, with decent economy and easy roof operation. Limited storage suits couples, not families.

Long-Term Ownership Considerations

Maintenance on the N54 engine can be costly due to turbo complexity, but reliability is solid with regular servicing. Resale holds well for low-mileage examples. Today, used models offer flagship performance at bargain prices.

Frequently Asked Questions (FAQs)

Is the BMW Z4 sDrive35is reliable?

Generally yes, but watch for turbo and DCT issues; BMW’s warranty covers early models well.

How does it compare to the Porsche Boxster?

More power and luxury, but less agile chassis.

What’s the fuel economy like?

Around 25-30 mpg mixed, better than rivals in some tests.

Can the roof operate while driving?

Yes, up to 31 mph in 20 seconds.

Is it a good used buy?

Excellent value now, with thrilling performance.