The 4 Series four-door coupe will make its public premiere at next year's Geneva Motor Show.
Prototypes of the 4 Series GranCoupe have been spied once more, this time undergoing cold weather testing in northern Sweden. The 4 Series GranCoupe will be a sporty alternative to the 3 Series saloon and form part of a three-model lineup mirroring the 6 Series, which also boasts a coupe, convertible and four-door GranCoupe. Due to debut at the 2014 Geneva Motor Show, the new model will be rolled out after the coupe debuts at the Frankfurt Motor Show in September and the convertible is introduced at the LA Auto Show in November.
Whereas the 4 Series coupe and cabrio use the underpinnings of the 3 Series sedan and wagon, the GranCoupe sits on an extended version of BMW's RWD platform, sharing its wheelbase with the 3 Series GT and Chinese-market sedan. Its couple-like visuals, such as a lower, more heavily-curved roofline and frameless doors, will thus be backed up by greater rear-seat leg room, while engines will be shared with the other 4 Series models including a 242hp 2.0-liter four for the 428i. BMW will pit the 4 Series GranCoupe against the Audi A5 Sportback and will follow it up with an M4 GranCoupe in 2015 packing a new 445hp twin-turbo 3.0-liter straight-six.