The Complete Guide to BMW's Convertibles & the Z4 Roadster: Open-Air Driving at Its Finest

There's nothing quite like dropping the top and feeling the wind rush in as you accelerate through an open road — and nobody does it quite like BMW. From the iconic two-seat Z4 Roadster to the grand touring elegance of the 8 Series Convertible, BMW's open-top lineup is a masterclass in combining raw driving emotion with everyday livability.

Whether you're dreaming of weekend canyon runs or simply want to make every commute feel like an event, this guide covers everything you need to know about BMW's convertible models — and helps you figure out which one belongs in your driveway.

What Makes a BMW Convertible Special?

BMW has been building open-top cars for decades, and the philosophy behind every one is the same: the driving experience comes first. Where some brands treat convertibles as style exercises, BMW treats them as driver's cars that happen to have a retractable roof.

Every BMW convertible and roadster is engineered with:

• Balanced chassis dynamics tuned specifically for open-top driving, with reinforced body structures to compensate for the missing roof
• Wind deflectors and acoustic engineering that let you hold a conversation at highway speeds with the top down
• Rapid roof operation — most BMW soft tops open or close in under 20 seconds, even while moving at low speeds
• Driver-focused cockpits with intuitive controls and technology that never gets in the way of the road ahead

Whether you're threading through mountain switchbacks or cruising down the shore, a BMW convertible is built to make every mile feel intentional.

The BMW Convertible & Roadster Lineup

BMW Z4 Roadster — The Purist's Choice

If you want the most visceral, authentic open-air driving experience BMW offers, the BMW Z4 is your answer. This two-seat roadster was co-developed with Toyota (which produced the GR Supra using the same platform) and represents BMW's most focused driver's car in the current lineup.

The Z4 is offered in two variants:

• Z4 sDrive30i — A turbocharged 2.0-liter four-cylinder producing 255 horsepower, delivering a 0–60 mph time of around 5.0 seconds. Agile, responsive, and perfectly balanced for spirited driving.
• Z4 M40i — The performance flagship, powered by a turbocharged 3.0-liter inline-six with 382 horsepower and a 0–60 mph time of just 3.9 seconds. This is sports car territory in every sense of the word.

Both variants feature a soft-top roof that opens in just 10 seconds, a low-slung driving position that puts you right in the heart of the action, and a rear-wheel-drive layout that rewards skilled drivers. The Z4's cabin is tight but beautifully appointed, with BMW's latest iDrive technology and a driver-centric cockpit design.

Perfect for: Driving enthusiasts, weekend warriors, and anyone who wants a true sports car experience.

BMW 4 Series Convertible — The Everyday Convertible

The BMW 4 Series Convertible is the sweet spot for drivers who want open-air freedom without giving up practicality. Available as the 430i Convertible and the performance-oriented M440i xDrive Convertible, it offers a genuine four-seat cabin, a generous trunk, and all-season versatility that makes it a car you can enjoy every day — not just on perfect weather weekends.

• 430i Convertible — A 2.0-liter turbocharged four-cylinder producing 255 horsepower, delivering a smooth, refined driving experience with excellent fuel efficiency for a convertible.
• M440i xDrive Convertible — A turbocharged 3.0-liter inline-six with 382 horsepower and BMW's intelligent all-wheel-drive system, making it a capable performer in all conditions. 0–60 mph in just 4.4 seconds.

The 4 Series Convertible uses a soft-top fabric roof that opens in 18 seconds at speeds up to 31 mph — meaning you can drop the top at a stoplight without missing a beat. The rear seats are genuinely usable for adults on shorter trips, making it one of the most versatile convertibles on the market.

Perfect for: Buyers who want a daily-drivable convertible with room for passengers, or couples looking for a luxurious weekend escape vehicle.

BMW M4 Convertible — Unleashed Performance

For drivers who want the most exhilarating open-top experience BMW produces, the BMW M4 Convertible is in a class of its own. Built by BMW M GmbH — the same division responsible for BMW's race car programs — the M4 Convertible combines race-derived engineering with the freedom of a soft top.

Powered by a hand-assembled, twin-turbocharged 3.0-liter inline-six, the M4 Convertible produces 503 horsepower in Competition xDrive trim and rockets from 0–60 mph in a breathtaking 3.4 seconds. The suspension, braking, and steering systems are all M-specific, delivering a level of driver engagement that simply doesn't exist anywhere else in the convertible segment.

Yet for all its performance capability, the M4 Convertible still manages to be a genuinely comfortable, feature-rich grand tourer — equally at home on a track day as on a cross-country road trip.

Perfect for: Performance enthusiasts who refuse to compromise, and drivers who want the fastest BMW convertible money can buy.

BMW 8 Series Convertible — The Grand Touring Statement

If the Z4 is BMW's sports car and the 4 Series is its everyday convertible, the BMW 8 Series Convertible is its grand touring masterpiece. Long, low, and unmistakably dramatic in its styling, the 8 Series Convertible is designed for drivers who want maximum luxury, effortless long-distance touring, and a presence on the road that turns heads wherever they go.

Available as the 840i Convertible and the M850i xDrive Convertible, the 8 Series offers:

• 840i — A turbocharged 3.0-liter inline-six with 335 horsepower, ideal for relaxed, refined long-distance touring.
• M850i xDrive — A 4.4-liter twin-turbocharged V8 producing 523 horsepower with xDrive all-wheel drive. 0–60 mph in 3.7 seconds. This is BMW luxury at its most powerful.

The 8 Series Convertible's cabin is one of the finest interiors BMW produces — wrapped in Merino leather, loaded with the latest BMW curved display technology, and designed to cosset driver and passenger alike on even the longest journeys.

Perfect for: Luxury car buyers, grand touring enthusiasts, and drivers who want a convertible that makes a serious statement.

Top Down, Year-Round: Tips for Convertible Ownership

One of the most common questions convertible shoppers ask is: can I really drive this year-round in New Jersey? The answer, especially for models with xDrive all-wheel drive, is a confident yes — with a few tips to keep in mind:

• Heated seats and a wind blocker make cool-weather top-down driving genuinely comfortable well into fall.
• A quality car cover protects your soft top during extended storage if you do decide to put it away for the winter months.
• The M440i xDrive and M850i xDrive are particularly capable in wet or slippery conditions, making them sensible four-season choices.
• Regular soft-top care — cleaning and conditioning the fabric a few times per year — keeps your roof looking new and extends its life significantly.

Find Your Perfect BMW Convertible at BMW of Bridgewater

There's something undeniably special about experiencing a BMW convertible in person — the way the roof glides open, the sound of the engine with nothing above you but sky, and that first pull away from a stoplight with the wind in your hair.

At BMW of Bridgewater, our team is ready to help you find the open-top BMW that fits your driving style, lifestyle, and budget. Whether you're drawn to the raw excitement of the Z4, the everyday versatility of the 4 Series Convertible, or the grand touring luxury of the 8 Series, we have the knowledge and the inventory to make your dream car a reality.

Visit BMW of Bridgewater today and schedule a test drive. Because some things are better experienced than explained.

Have questions about BMW's convertible lineup? Reach out to our team or stop by the dealership — we'd love to help you find your perfect open-air BMW.