How far will a full tank take you in BMW’s final roadster — and how quick is it when you stop caring? The short answer: BMW Z4 Roadster mileage is officially rated at 28 mpg combined for the sDrive30i, 25 mpg for the M40i automatic, and 22 mpg for the M40i manual, with real-world owners regularly beating those numbers on the highway. Pair that efficiency with a 3.9-second 0–60 sprint from the 382-horsepower M40i, and the 2026 BMW Z4 Roadster delivers one of the best performance-per-gallon ratios of any sports car on sale. In this guide, we break down EPA ratings by trim, real owner-reported BMW Z4 Roadster mileage, premium fuel costs, acceleration and transmission character, and how the Z4 actually feels to drive every day — top up and top down.
If you are still deciding between trims, start with our 2026 BMW Z4 Roadster review for full pricing and specs before diving into BMW Z4 Roadster mileage and driving details below.
BMW Z4 Roadster Mileage, MPG & Fuel Economy
BMW Z4 Roadster mileage is a genuine strong point for a rear-drive sports car. The four-cylinder sDrive30i posts some of the best fuel economy figures in the segment, while even the 382-hp M40i stays respectable — and owner data shows the EPA numbers are conservative for gentle highway cruising.
EPA City, Highway & Combined MPG by Trim
The EPA rates BMW Z4 Roadster mileage for each 2026 configuration separately, and the spread between trims is wider than you might expect:
| Trim / Transmission | City MPG | Highway MPG | Combined MPG |
|---|---|---|---|
| sDrive30i (8-speed automatic) | 25 | 33 | 28 |
| M40i (8-speed automatic) | 23 | 29 | 25 |
| M40i (6-speed manual) | 19 | 26 | 22 |
The sDrive30i’s 28 mpg combined is excellent for a sports car — better than many family sedans were a decade ago. The M40i automatic gives up only 3 mpg combined despite adding 127 horsepower, which speaks to the efficiency of BMW’s B58 inline-six. The manual takes the biggest hit at 22 mpg combined, the price of three-pedal engagement. All figures assume premium unleaded gasoline, which BMW requires for both engines. A full list of 2026 BMW Z4 specifications is published on Autoblog.
Real-World BMW Z4 Mileage & Premium Fuel Costs
EPA numbers are measured in a lab; owner fuel logs tell the real story. According to Fuelly owner-reported data for the G29-generation Z4, based on 309 fuel-ups and over 84,000 miles of driving, real-world BMW Z4 Roadster mileage averages 29.84 mpg combined — with sDrive30i owners reporting 33–34 mpg and M40i owners around 24.9 mpg in mixed driving.
Highway cruising is where BMW Z4 Roadster mileage truly shines. Owners on enthusiast forums report 34–35 mpg from the M40i in relaxed highway driving, with one owner logging 37.2 mpg over a 127-mile interstate trip at nearly 74 mph average. In Eco Pro mode with a light foot, the M40i can nearly match the sDrive30i’s highway rating — remarkable for a 382-hp sports car.
What does that cost? Both engines require premium fuel. At roughly $4.00 per gallon for premium and 12,000 miles per year, annual fuel spending works out to about $1,700 for the sDrive30i (28 mpg combined), $1,920 for the M40i automatic (25 mpg), and $2,180 for the M40i manual (22 mpg). Drive mostly highway miles and those numbers drop further. Fuel is one of the smaller running costs — for the bigger picture, see our Z4 Roadster maintenance cost guide covering service, tires, and brakes.
BMW Z4 Roadster Performance & Acceleration
Efficiency is only half the BMW Z4 Roadster story. This is a car that pairs 25-mpg BMW Z4 Roadster mileage with a sub-4-second 0–60 run in M40i automatic form, plus a chassis tuned for genuine driver engagement rather than just straight-line speed.
sDrive30i vs M40i Engine and 0–60 MPH Performance
The sDrive30i’s 2.0-liter turbo four makes 255 hp and 295 lb-ft, reaching 60 mph in 5.2 seconds. That is properly quick — faster than most hot hatches — with strong low-end torque from just 1,550 rpm making it feel eager around town.
The M40i’s 3.0-liter B58 turbo inline-six is a different league: 382 hp, 369 lb-ft, and a 3.9-second 0–60 run with the 8-speed automatic (4.2 seconds with the manual). The power delivery is linear and relentless, pulling hard all the way to redline with an exhaust note the four-cylinder cannot match. Both cars are limited to 155 mph.
| Performance Metric | sDrive30i | M40i Automatic | M40i Manual |
|---|---|---|---|
| Horsepower | 255 hp | 382 hp | 382 hp |
| Torque | 295 lb-ft | 369 lb-ft | 369 lb-ft |
| 0–60 mph | 5.2 sec | 3.9 sec | 4.2 sec |
| Top speed | 155 mph | 155 mph | 155 mph |
| Curb weight | 3,314 lbs | 3,543 lbs | ~3,565 lbs |
| Power-to-weight | 13.0 lbs/hp | 9.3 lbs/hp | 9.3 lbs/hp |
Automatic vs Manual Transmission Driving Experience
The ZF 8-speed automatic is the rational choice: lightning-fast shifts, seamless around town, and the quickest accelerator — 3.9 seconds to 60. In Sport mode it holds gears aggressively and blips downshifts; in Comfort it fades into the background.
The 6-speed manual, exclusive to the M40i via the $3,500 Handschalter package, is the emotional choice. The clutch is light with a clear bite point, the shifter has a short mechanical throw, and active rev matching makes every downshift sound heroic. It is three tenths slower to 60 mph and trims BMW Z4 Roadster mileage by 3 mpg combined — and according to The Drive’s review of the manual M40i, it is also the version enthusiasts will remember. BMW even retuned the steering, dampers, and differential mapping specifically for the manual car. If you can drive stick, this is the one to get before it is gone forever.
BMW Z4 Roadster Real-World Driving Experience
Numbers get you interested; beyond BMW Z4 Roadster mileage figures, the driving experience is what sells the BMW Z4 Roadster. According to our experience evaluating owner reports and professional reviews, the Z4’s defining trait is balance — it is engaging when you want it to be and relaxing when you do not, a duality few sports cars manage this well.
Handling, Steering Feel & Ride Comfort
The Z4 rides on a stiff chassis co-developed with the Toyota Supra, with near-50/50 weight distribution and a low center of gravity. Turn-in is sharp, body roll is well controlled, and the M40i’s M Sport differential puts power down cleanly out of corners. Steering is precise and nicely weighted, though ultimate feedback is a step behind a Porsche 718 Boxster’s — the trade-off for a calmer, less darty feel.
Ride comfort is a genuine surprise. In Comfort mode with the adaptive dampers, the Z4 absorbs broken pavement with a suppleness rare in sports cars — far more forgiving than the previous hardtop generation. Sport mode firms things up noticeably for back-road blasts. The sDrive30i on smaller wheels rides the best; the M40i’s staggered 19/20-inch setup looks great but transmits more road texture.
City Driving, Highway Cruising & Long-Distance Comfort
Around town, the BMW Z4 Roadster is refreshingly easy. Visibility is good for a convertible, the turning circle is tight, light steering and a smooth automatic make traffic painless, and the compact 170.7-inch length slips into parking spots larger sports cars cannot use. The sDrive30i is the sweet spot here — torquey, quiet, and delivering the best BMW Z4 Roadster mileage of the range.
On the highway, the Z4 is a superb long-distance companion. The cabin stays hushed with the top up, the seats remain comfortable after hours, adaptive cruise control (available via the Driving Assistance package) takes the strain off, and BMW Z4 Roadster mileage stretches past 400 miles of highway range in the sDrive30i. Owners regularly report 500+ mile days without fatigue — this is a grand tourer wearing sports-car clothes.
BMW Z4 Roadster Open-Top Driving Experience
Beyond BMW Z4 Roadster mileage and pace, a roadster is defined by its open-top experience — and this is where the BMW Z4 Roadster earns its badge. The fabric soft top is quick, the cabin is well-managed in the wind, and the car feels designed around top-down driving rather than merely tolerating it.
Soft Top Operation, Wind Noise & Weather Usability
The power soft top opens or closes in about 10 seconds at speeds up to 31 mph — use it at a stoplight without holding up traffic. Top up, the multi-layer fabric insulates impressively: conversation stays easy at 70 mph and rain stays firmly outside. Top down with the windows up, wind buffeting is mild for a convertible; an optional wind deflector between the seats calms it further for sustained high-speed cruising.
Heated seats with memory are now standard — a meaningful feature that extends the top-down season deep into spring and fall. Pair them with the heated steering wheel and you can comfortably drive top-down in 50-degree weather. The fabric roof needs only basic care: regular cleaning and a yearly fabric protectant treatment.
Driving Comfort with the Roof Up vs Down
Roof up, the BMW Z4 Roadster is essentially a quiet coupe: refined, secure, and practical in any weather. Roof down, it transforms — more noise and wind, obviously, but also more connection to the road, the exhaust, and the surroundings. The Harman Kardon audio system stays clear with the top down, and there is no structural shudder over bumps, a testament to the stiff chassis.
Watch a POV drive of the final-year M40i to feel the open-top driving experience firsthand:
BMW Z4 Roadster Performance vs Fuel Economy
The eternal sports-car question: how much BMW Z4 Roadster mileage must you sacrifice for speed? In the BMW Z4 Roadster, the answer is refreshingly little — which makes choosing an engine about character and budget more than compromise.
Which Z4 Engine Offers the Best Balance?
For most buyers, the sDrive30i offers the best balance of BMW Z4 Roadster mileage and pace: 5.2-second speed, 28 mpg combined, a $12,300 lower starting price, and cheaper insurance. It is the thinking person’s roadster — 90% of the fun at 70% of the cost.
But the M40i automatic might be the true sweet spot: it sacrifices only 3 mpg of BMW Z4 Roadster mileage for 127 extra horsepower and sub-4-second acceleration, while remaining capable of 30+ mpg on gentle highway runs. The manual is the enthusiast’s indulgence — the least efficient, the most engaging, and likely the future collectible. There is no wrong answer; only different priorities. And whichever you choose, budget beyond fuel too — our Z4 Roadster maintenance cost guide covers the full ownership picture.
How the Z4 Drives Compared with Other Roadsters
Against the Mazda MX-5 Miata ($31,665), the BMW Z4 Roadster feels like a bigger, more grown-up machine: far more power and refinement, a plusher cabin, and better high-speed stability — at twice the price and with less of the Miata’s telepathic lightness.
Against the Porsche 718 Boxster (~$79,595), the Z4 M40i is faster in a straight line, cheaper to buy and run, and more comfortable daily — while the mid-engine Porsche remains the sharper track tool with purer steering feel. With Porsche closing 718 orders ahead of electrification, the Z4 is also the simpler car to buy new in 2026. For most drivers on real roads, the BMW strikes the better balance of speed, comfort, and value.
FAQs About BMW Z4 Roadster Mileage & Performance
Quick answers to the most common questions about BMW Z4 Roadster mileage, fuel economy, and real-world performance.
What is the BMW Z4 Roadster mileage per gallon?
EPA-rated BMW Z4 Roadster mileage is 25/33/28 mpg city/highway/combined for the sDrive30i, 23/29/25 for the M40i automatic, and 19/26/22 for the M40i manual. Real-world owners often beat these figures on the highway, with M40i drivers reporting 34+ mpg in gentle cruising.
Does the BMW Z4 require premium gas?
Yes — BMW requires premium unleaded gasoline (91 octane or higher) for both the sDrive30i and M40i engines. Using regular fuel can cause knocking and reduced performance, so factor premium prices into your fuel budget.
How fast is the 2026 BMW Z4 0–60 mph?
The M40i automatic hits 60 mph in 3.9 seconds, the M40i manual in 4.2 seconds, and the sDrive30i in 5.2 seconds. Top speed is 155 mph for all versions.
What is the real-world highway range of the BMW Z4?
With a 13.9-gallon tank and 33 mpg highway rating, the sDrive30i can theoretically cover 450+ miles per tank; owners regularly see 400+ miles in mixed highway driving. The M40i manages roughly 350–400 miles of highway range depending on driving style.
Is the manual or automatic Z4 better?
The automatic is faster (3.9 vs 4.2 seconds to 60), more efficient (25 vs 22 mpg combined), and easier daily. The manual is more engaging, with a light clutch, rev matching, and model-specific chassis tuning — and as the last manual BMW roadster, it is the collector’s pick.
How does BMW Z4 Roadster mileage compare to the Porsche 718 Boxster?
The BMW Z4 Roadster is more efficient: the sDrive30i is rated 25/33 mpg versus the Boxster’s 21/27 mpg, and the M40i’s 23/29 mpg also beats the Porsche. Real-world BMW Z4 Roadster mileage from owners confirms the advantage, especially on the highway.
BMW Z4 Roadster mileage proves you do not have to choose between efficiency and excitement. With up to 33 mpg on the highway, 400+ miles of real-world range, and sub-4-second pace in M40i form, the final-year Z4 is that rare sports car that sips fuel on the commute and devours back roads on the weekend. Add an available manual gearbox and a 10-second soft top, and there has never been a better — or a last — time to buy BMW’s roadster.
