BMW said its new 4-Series coupe improves the handling ability of the 3-Series sedan on which it's based by a "sizeable margin."
BMW is entering the final phase of testing the car ahead of its global sales launch in the fourth quarter, the automaker said in a statement.
The latest-generation 4 Series was previewed by the Concept 4 at the 2019 Frankfurt auto show.
The concept's appearance was dominated by an oversized version of BMW's traditional kidney grille, dividing the opinion of showgoers. A picture of the production car undergoing road tests appears to show the size of the grille has been reduced.