The 2025 BMW Z4 is a petrol convertible with RWD and seating for 2. It belongs to the G29 LCI generation. The M40i is the version described here, and the figures below refer to that configuration unless noted otherwise.
Performance
The featured M40i version develops 382 hp and 500 Nm (369 lb-ft) of torque. Its listed 0-100 km/h time is 4.1 seconds, which is seriously quick. Top speed is listed at 250 km/h (155 mph). Its power output is about 34% above the peer average. Its 0-100 km/h time is about 25% quicker than the peer average. The figures establish its straight-line performance on paper, but they do not substitute for measured braking, handling or ride-quality tests.
Fuel economy and range
The listed fuel consumption is 8.9 L/100km. Fuel-tank capacity is 52.0 litres (13.7 US gallons). Recorded CO2 emissions are 203 g/km. Consumption, emissions and range can be measured under different regional procedures, so like-for-like comparisons should use the same market and test cycle.
Dimensions and practicality
Its exterior dimensions are 4,324 mm (170.2 in) in length, 1,864 mm (73.4 in) in width, and 1,304 mm (51.3 in) in height, while the wheelbase measures 2,470 mm (97.2 in). Cargo capacity is listed at 281 litres (9.9 cu ft). The cabin is configured for 2 occupants. Listed curb weight is 1,535 kg (3,384 lb). That cargo volume is about 63% above the peer average. The measurements are useful for comparison, although seat comfort, access and the shape of the load area still need to be judged in person.
In perspective
Compared with nearby petrol convertible models from the same period, the 2025 BMW Z4 is strongest on cargo capacity and power, while price stands out as the principal numerical compromise. That conclusion is drawn from the recorded specifications rather than a road test. A final choice should also account for local pricing, equipment, comfort and a test drive.
Prepared by CarsbySpec. Peer context: 2024-2026 petrol convertibles in the CarsbySpec database. This page is built from the structured specifications displayed here; missing values are not estimated. Read the methodology.
