The 428i GC’s test sheet reads as well as duplicate from the coupe’s. Along with identical gearing and wearing a similar staggered 18-inch Bridgestone Potenza S001 run-flat all season tires, the GC running the ¼-mile within fourteen point two seconds at 98 Miles per hour, just a tenth of a second and one Miles per hour behind this coupe. A 162-foot stop from 70 mph trim down 2 foot from the coupe’s overall performance. skidpan grip had been the same on 0.89 g.
This cars abuse not anymore difference on the highway. As soon as you had selected the sport driving mode in order to stiffen up a adaptive dampers included in the $1000 Dynamic Handling package deal on our test automobile, the GC demonstrates the platform’s customary attribute: a satisfyingly reliable control from body moves undermined by unexceptional steering feel.
The 3664-pound Gran Coupe weighs 135 pounds greater than a coupe, sufficient to drop the EPA highway rating from thirty-five mpg to thirty four for the GC. Many of us discovered 27 combined.