Compare the2026 MINI Cooper ConvertibleVS 2026 BMW Z4

The Cooper Convertible offers an optional 360-degree camera to allow the driver to see objects all around the vehicle on a screen. The Z4 only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.

Both the Cooper Convertible and Z4 offer Cross Traffic Warning, but the Cooper Convertible with Cross Traffic Warning also has Brake Intervention (automatically applies the brakes) to better prevent a collision when backing near traffic. The Z4’s Cross Traffic Warning doesn’t automatically brake.

Both the Cooper Convertible and the Z4 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, rearview cameras, driver alert monitors, available lane departure warning systems and blind spot warning systems.

On the EPA test cycle the Cooper Convertible gets better mileage than the Z4:

To lower fuel costs and make buying fuel easier, the MINI Cooper Convertible uses regular unleaded gasoline (premium recommended for maximum performance). The Z4 sDrive30i requires premium, which can cost on average about 84.9 cents more per gallon.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the MINI Cooper Convertible higher (6 to 7 out of 10) than the BMW Z4 (4 to 6). This means the Cooper Convertible produces up to 13.2 pounds less smog-producing pollutants than the Z4 every 15,000 miles.

The Cooper Convertible offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The Z4 doesn’t offer an SMG.

The Cooper Convertible is 1 foot, 5.9 inches shorter than the Z4, making the Cooper Convertible easier to handle, maneuver and park in tight spaces.

The Cooper Convertible has standard seating for 4 passengers; the Z4 can only carry 2.

The Cooper Convertible has 24.9 cubic feet more passenger volume than the Z4 (76.9 vs. 52).

J.D. Power and Associates surveys of service recipients show that MINI service is better than BMW. J.D. Power ranks MINI fourth in service department satisfaction. With a 12% lower rating, BMW is ranked 10th.

The Cooper Convertible’s optional easy entry system glides the driver’s seat back when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The Z4 doesn’t offer an easy entry system.

The Cooper Convertible has a standard heated steering wheel to take the chill out of steering on extremely cold winter days before the car heater warms up. A heated steering wheel costs extra on the Z4.

The Cooper Convertible offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the Z4.

The Cooper Convertible’s optional Parking Assistant Plus can parallel park or back into a parking spot by itself, starting, stopping and changing direction automatically. Remote Control Parking will park and retrieve your car remotely: press a button and watch it park itself. This is ideal for tight locations. The Z4’s automatic parking system requires operating the brakes and transmission to safely park and it doesn’t offer remote control parking.

The MINI Cooper comes in coupe, convertible and four door hatchback bodystyles; the BMW Z4 isn’t available as a coupe or four door.

J.D. Power and Associates rated the Cooper Convertible second among compact sporty cars in owner reported satisfaction. This includes how well the vehicle performs and satisfies its owner’s expectations. The Z4 isn’t in the top three.