BMW has taken the wraps off its all-new 2021 4 Series Coupe, which goes on sale in October. This new 2021 BMW 4 Series Coupe is 5.2 inches longer and an inch wider than the previous 4 Series Coupe, and its wheelbase has been increased by 1.6 inches — to the same length as that of the current BMW 3 Series sedan. Viewed another way, the new 4 Series Coupe is 2.2 inches longer, 1 inch wider and 2.2 inches lower than the 3 Series sedan, while having an inch wider rear track.
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