Our 428i GC’s test sheet says as good as replicate of the coupe’s. With similar gearing and putting on exactly the same staggered 18-inch Bridgestone Potenza S001 run-flat all season tires, this GC to run the 1/4-mile within 14.2 seconds in 98 Miles per hour, just a tenth of a 2nd and one Miles per hour behind the coupe. A 162-feet end from seventy Miles per hour trim away two foot from a coupe’s high-performance . Skidpad grip had been the same in 0.89 g.
The cars betray no longer change on the highway. When you had picked the sport driving mode to stiffen up the adaptive dampers contained in the $1000 Dynamic Handling package deal in our test auto, this GC shows the platform’s customary attribute: a satisfyingly reliable control of entire body motions undermined by unexceptional steering feel.
The 3664-pound Gran Coupe weighs 135 pounds greater than a coupe, adequate to drop the EPA highway rating from 35 mile/gallon to 34 for the GC. We saw 27 combined.