BMW's electric i4 Convertible has been spotted testing for the first time, ahead of its expected launch around 2028.
The two-door, soft-top model is a convertible version of the recently revealed i3 sedan and will be sold alongside a combustion-powered 4-series drop-top.
Known internally as NA3, the i4 Convertible features a classic folding cloth soft top.
BMW moved away from retractable hardtops in 2020 to save weight and improve trunk space, a decision that makes even more sense for an EV carrying a large battery under the floor.
Shorter Wheelbase Raises Questions
The prototype spotted in Germany is heavily camouflaged but retains most of the Neue Klasse design cues seen on the i3 sedan.
However, it appears to have a shorter wheelbase than the i3's 2,898 mm (114.1 inches).
This raises questions about whether the i4 Convertible will be a genuine four-seater or a 2+2 to fill the gap left by the discontinued Z4.
Convertibles typically need extra reinforcement to compensate for the lack of a fixed roof, but that space is occupied by the EV's battery.
Keeping the body stiff without adding excessive weight will be a key engineering challenge for BMW.
Powertrain and Range Expectations
Powertrain details are not yet official, but the i3 sedan provides a preview.
Its 50 xDrive model uses two electric motors producing 463 hp (469 PS / 345 kW) and a 108.7 kWh battery with 800-volt architecture, enabling charging at up to 400 kW.
That setup delivers 440 EPA range miles (708 km) and 559 miles (900 km) on the WLTP cycle.
The prototype's wheels and brake calipers suggest it is an i4 50 xDrive, but a cheaper i4 40 could borrow the iX3 40's 316 hp rear motor and smaller 82.6 kWh battery pack.
However, the shorter wheelbase may limit the ability to fit the full 108.7 kWh battery.
Interior and Lineup
Inside, the i4 Convertible is expected to feature BMW's Panoramic iDrive setup, which includes a display stretching across the base of the windshield, a 17.9-inch touchscreen, and an optional 3D head-up display.
This system debuted on the iX3 and is now being rolled out to other models.
The convertible will not be alone. A fixed-roof i4 Coupe is also coming, along with combustion-powered versions of both body styles.
BMW is also developing electric M4 Coupe and Convertible models, while six-cylinder M4s will continue alongside them.
This means the future 4-series lineup will offer options for a wide range of buyers, including those seeking an electric convertible with four seats.
