Last year, BMW confirmed that it was going to put its all-electric four-door coupé concept, the i Vision Dynamics, into production as a follow up to the upcoming iX3 SUV. Our spy photographers have now caught the car, set to be called the BMW i4, on a trailer ahead of its expected unveiling in 2021.

As it’s still in early stages of development, this test mule is wearing copious amounts of camouflage, but even here it’s clear that the i4 won’t look exactly like the show car. In fact, it looks more like a next-generation 4 Series Gran Coupé, if it weren’t for the “Electric Test Vehicle” stickers along the sides.

Firstly, the glasshouse omits the distinctive B-pillar kinks, so it no longer mirrors the shape of the conjoined double kidney grille. The headlights are also larger than the concept’s slitlike items, and it’s also unlikely that the polarising full-height “grilles” will be retained. At the rear, one can spot regular L-shaped tail lights and a tailgate instead of a regular bootlid, along with a hilarious printed-on “exhaust pipe”.

No technical details have been revealed just yet, but the car should feature the automaker’s fifth-generation electric tech, which will offer among other things a choice of three modular battery kits with varying capacities, ranging from 60 kWh (approximately 450 km range) and 90 kWh (approximately 550 km range) to 120 kWh (approximately 700 km range).

By comparison, the i Vision Dynamics boasted a 600 km operating range, a zero-to-100 km/h time of four seconds and a top speed of 200 km/h. The i4 will arrive a year after the iX3, and around the same time as the production version of last year’s Vision iNEXT.